June 20th, 2017

Tangent vs. Secant vs. Hybrid — Bullet Ogive Geometry Explained

Secant and Tangent Ogive Bryan LitzWe know many of our readers aren’t 100% clear on the difference between a secant ogive bullet and a tangent ogive bullet. Add the “blended” or “hybrid” ogive into the design equation and you add to the confusion. In this article, Berger Ballistician Bryan Litz, explains the characteristics of the three popular ogive types: tangent, secant, and hybrid.

In discussions of ballistics, you’ll see references to “tangent” and “secant” bullet shapes. For many readers, these terms can be confusing. To add to the confusion, bullet makers don’t always identify their projectiles as secant or tangent designs. This article provides a basic explanation of tangent and secant designs, to help you understand the characteristics of both bullet shapes.

Tangent vs. Secant vs. Hybrid
Most match bullets produced today use a tangent ogive profile, but the modern VLD-style bullets employ a secant profile. To further complicate matters, the latest generation of “Hybrid” projectiles from Berger Bullets feature a blended secant + tangent profile to combine the best qualities of both nose shapes. The secant section provides reduced drag, while the tangent section makes the bullet easier to tune, i.e. less sensitive to bullet seating depth position.

Berger Bullets ballistician Bryan Litz explains tangent and secant bullet ogive designs in a glossary section of his Applied Ballistics website, which we reprint below. Bryan then explains how tangent and secant profiles can be combined in a “hybrid” design.

How Bullet Ogive Curves are Defined
While the term “ogive” is often used to describe the particular point on the bullet where the curve reaches full bullet diameter, in fact the “ogive” properly refers to the entire curve of the bullet from the tip to the full-diameter straight section — the shank. Understanding then, that the ogive is a curve, how is that curve described?

LITZ: The ogive of a bullet is usually characterized by the length of its radius. This radius is often given in calibers instead of inches. For example, an 8 ogive 6mm bullet has an ogive that is a segment of a circular arc with a radius of 8*.243 = 1.952”. A .30-caliber bullet with an 8 ogive will be proportionally the same as the 8 ogive 6mm bullet, but the actual radius will be 2.464” for the .30 caliber bullet.

For a given nose length, if an ogive is perfectly tangent, it will have a very specific radius. Any radius longer than that will cause the ogive to be secant. Secant ogives can range from very mild (short radius) to very aggressive (long radius). The drag of a secant ogive is minimized when its radius is twice as long as a tangent ogive radius. In other words, if a tangent ogive has an 8 caliber radius, then the longest practical secant ogive radius is 16 calibers long for a given nose length.”

hybrid bullet

Ogive Metrics and Rt/R Ratio
LITZ: There is a number that’s used to quantify how secant an ogive is. The metric is known as the Rt/R ratio and it’s the ratio of the tangent ogive radius to the actual ogive radius for a given bullet. In the above example, the 16 caliber ogive would have an Rt/R ratio of 0.5. The number 0.5 is therefore the lowest practical value for the Rt/R ratio, and represents the minimum drag ogive for a given length. An ogive that’s perfectly tangent will have an Rt/R ratio of 1.0. Most ogives are in between an Rt/R of 1.0 and 0.5. The dimensioned drawings at the end of my Applied Ballistics book provide the bullets ogive radius in calibers, as well as the Rt/R ratio. In short, the Rt/R ratio is simply a measure of how secant an ogive is. 1.0 is not secant at all, 0.5 is as secant as it gets.

Berger Hybrid bullet, .308 30 CaliberHybrid Bullet Design — Best of Both Worlds?
Bryan Litz has developed a number of modern “Hybrid” design bullets for Berger. The objective of Bryan’s design work has been to achieve a very low drag design that is also “not finicky”. Normal (non-hybrid) secant designs, such as the Berger 105gr VLD, deliver very impressive BC values, but the bullets can be sensitive to seating depth. Montana’s Tom Mousel has set world records with the Berger 105gr VLD in his 6mm Dasher, but he tells us “seating depth is critical to the best accuracy”. Tom says a mere .003″ seating depth change “makes a difference”. In an effort to produce more forgiving high-BC bullets, Bryan Litz developed the hybrid tangent/secant bullet shape.

Bryan Litz Explains Hybrid Design and Optimal Hybrid Seating Depths

Story sourced by Edlongrange.
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June 6th, 2017

Extreme Long Range Training — Rockin’ Two Miles at Raton

ELR Raton 2 miles KO2M 375 Lethal Magnum
Shooter behind the .375 Lethal Magnum. Check out the size of that suppressor!

Two-Mile ELR Training
ELR Raton 2 miles KO2M 375 Lethal MagnumThe Applied Ballistics ELR Team spent the weekend at the NRA Whittington Center in New Mexico training for the upcoming King of 2 Miles event. Former USAMU coach Emil Praslick III was on hand to help with wind calls. The results were impressive — all team members had confirmed hits at 2.05 miles on a 36″x36″ steel target. Bryan Litz even had a 3-shot group that measured 17.5″ x 22″. That’s under 0.6 MOA!

Most guys would be happy with 0.6 MOA at 300 yards. Bryan did it at 3611 yards, shooting Paul Phillips’s .375 Lethal Magnum. When you consider all the variables involved (bullet BC variance, shot velocity variance, wind changes during flight, Coriolis effect etc.), that’s phenomenal.

ELR Raton 2 miles KO2M 375 Lethal Magnum

Report by Paul Phillips
Just got done shooting two days in New Mexico with Recoil Magazine and the Applied Ballistics ELR team. We learned a lot and had great success. Every team member made impacts on target at 2 miles. The best 3-shot group at 3611 yards (2.05 miles) was shot by Bryan Litz with my 375 Lethal Mag. The group measured 17.5 inches tall by 22 inches wide with Cutting Edge bullets. We also had Recoil’s David Merrill shoot at two miles and was laying them in there like a true pro. We had three team members make impacts on the 36-inch plate at two miles within just three attempts in a mock competition. I also increased my personal longest shot by hitting only 15 inches right of center at 3611 yards. 2.05 miles. I did it with a GSL Technology Copperhead Silencer.

ELR Raton 2 miles KO2M 375 Lethal Magnum

ELR Raton 2 miles KO2M 375 Lethal Magnum

Report by Emil Praslick
I participated in the Extreme Long Range training with the Applied Ballistics team at the Whittington Center in Raton, NM. All team members had confirmed hits at 2.1 miles. Components and hardware suppliers included: Berger Bullets, Cutting Edge Bullets, Nightforce Optics, Kestrel, FLIR Systems.

Q: At that distance (2.1 miles), how much do spin drift and the Coriolis effect impact bullet trajectories?

Praslick: At 3613 yards we had to adjust about 1.5 MOA/56″ of Coriolis (up), and 5 MOA/~190″ of right spin drift adjustment. You’d have to come down if facing East. The planet rotates counter-clockwise (from above), so your target would be falling away from you.

Here is a 3-round group at 1898 yards (1.08 Miles) shot with factory ABM Ammo .338 Lapua Magnum loaded with 300 grain Berger Bullets Hybrids. That’s sub-MOA elevation. (The guy calling wind didn’t do too bad, either.)

ELR Raton 2 miles KO2M 375 Lethal Magnum

Report by Bryan Litz
Learning is my favorite part of new ventures and we learned a LOT this weekend shooting extreme range in New Mexico. I connected on a second round hit on a 3-foot square target at 2 miles in simulated match conditions under coaches Emil Praslick and Paul Phillips. In fact all five of our team shooters got on at 2 miles. The Applied Ballistics Extreme Long Range team is in good shape for the King of 2 Miles match later this month, and there is still so much to LEARN!

ELR Raton 2 miles KO2M 375 Lethal Magnum

You need serious equipment for shooting beyond two miles. Who can identify this high-tech hardware?
ELR Raton 2 miles KO2M 375 Lethal Magnum

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June 3rd, 2017

The Wind Hack — Quick Way to Calculate Crosswind Deflection

Applied Ballistics Crosswind Estimation Wind hack G7 BC

Applied Ballistics Wind Hack

Any long range shooter knows that wind is our ultimate nemesis. The best ways of overcoming wind are to measure what we can and use computers to calculate deflection. The Applied Ballistics Kestrel is a great tool for this. As good as our tools may be, we don’t always have them at our fingertips, or they break, batteries go dead, and so on. In these cases, it’s nice to have a simple way of estimating wind based on known variables. There are numerous wind formulas of various complexity.

Applied Ballistics Crosswind Estimation Wind hack G7 BC

The Applied Ballistics (AB) Wind Hack is about the simplest way to get a rough wind solution. Here it is: You simply add 2 to the first digit of your G7 BC, and divide your drop by this number to get the 10 mph crosswind deflection. For example, suppose you’re shooting a .308 caliber 175-grain bullet with a G7 BC of 0.260 at 1000 yards, and your drop is 37 MOA. For a G7 BC of 0.260, your “wind number” is 2+2=4. So your 10 mph wind deflection is your drop (37 MOA) divided by your “wind number” (4) = 9.25 MOA. This is really close to the actual 9.37 MOA calculated by the ballistic software.

WIND HACK Formula

10 mph Cross Wind Deflection = Drop (in MOA) divided by (G7 BC 1st Digit + 2)

Give the AB wind hack a try to see how it works with your ballistics!

Some Caveats: Your drop number has to be from a 100-yard zero. This wind hack is most accurate for supersonic flight. Within supersonic range, accuracy is typically better than +/-6″. You can easily scale the 10 mph crosswind deflection by the actual wind speed. Wind direction has to be scaled by the cosine of the angle.

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June 1st, 2017

Long Range Shooting: Video Series with Bryan Litz

Bryan Litz Video Long Range large caliber rifles

Getting started in long-range shooting? Need some pointers on gun set-up and hardware options? Bryan Litz of Applied Ballistics has created a helpful series of videos for the NSSF covering long range shooting. Bryan, a past F-TR Long-Range National Champion and Chief Ballistician for Berger Bullets, knows his stuff. His Applied Ballistics squad was the winning team at the 2016 King of 2 Miles event. Here are four (4) videos, each covering a topic of interest for long-range shooters. Running 3-4 minutes each, these videos can help you get started, and invest wisely when acquiring your next long-range rifle, scope, and accessories.

Long Range Precision — The Keys to Success

TIP for Plotting Long Range Trajectories: You want to know the true, actual ballistic coefficients of your loads. The BCs listed by manufacturers for their projectiles may be somewhat unreliable — the real BC could be higher or lower (and BC can change with velocity). That can result in problems at longer distances. Using sophisticated equipment, Applied Ballistics has measured true BCs for hundreds of projectiles. Plugging these verified numbers into your Ballistics App can improve your hit percentage at long range.

Tools of Choice — Purpose-Built Long Range Rifles

TIP for Choosing a Rifle: When you’re selecting a rifle for long range shooting, it’s important to understand your application and objectives. The applications for long-range shooting can be very refined. You have to select all the details of your application to select the correct rifle. Here are two examples — a semi-auto AR-platform rifle with scope and a bolt-action Fullbore (Palma) rifle with aperture sights. There are many other long range disciplines — F-TR for example. The F-TR rig uses a bipod and rear bag and a scope. To be competitive, a modern F-TR rig should shoot well under half-MOA.

Equipment Advice — Upgrading Your Hardware

TIP for Upgrading Your Rifle: At some point factory rifle owners will recognize weak links in the equipment chain. You can run that factory rifle for quite some time, but the barrel is eventually what’s going to hold you back. The twist-rate may not be high enough to stabilize the high-BC bullets. So the first thing you’re going to want to upgrade is the barrel. You want to get a fast twist-rate barrel with a chamber that is optimized for the bullet you’ll be shooting. A good-quality, custom barrel will be easier to clean, and it will improve the overall accuracy and precision of your shooting.

Big Boomers — Large-Caliber Rifles for Long Range

TIP for Shooting Hard-Recoiling Rifles: Bryan Litz defines “Large Caliber” as .338 caliber and bigger. These rifles can shoot heavy bullets with high BCs. However there are some trade-offs. It can be hard to maintain good fundamentals of marksmanship (trigger control, sight alignment) when you’re fighting heavy recoil and burning 100+ grains of powder. You’re dealing with the challenges that high energy brings. You want a muzzle brake with any cartridge .338 or above. Also, when considering lathe-turned solid bullets, remember that these typically have less sectional density compared to lead-cored bullets with similar profiles. This affects ballistics as well as recoil energy.

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May 15th, 2017

New Website for Extreme Long Range — ELR Central

Extreme Long Range ELR Central Bryan Litz website Ballistics

There’s a new home on the web for Extreme Long Range (ELR) shooters. Bryan Litz and Applied Ballistics recently launched ELR Central, a new website dedicated to ultra-long-range shooting*. This new site will offer a wide variety of information. Bryan Litz explains: “The most visible element of ELR Central will be a website which will serve to publish and promote all ELR shooting events going on across the country. Although owned and operated by Applied Ballistics, ELR Central will rely heavily on input from the community in order to best serve the sport as a whole.” Along with the ELR Central website, Applied Ballistics has launched a new ELR Central Facebook page.

Content Available on ELR Central
The ELR Central website will eventually offer a comprehensive library of information and activity reports. Bryan and his team plans to build out the website to include all the following:

1. Map of ELR ranges across the USA.
2. List of ELR events with links to the Match Directors’ pages.
3. Technical information and articles for the ELR community.
4. Match results/reports, including equipment lists where available.
5. Analysis of what equipment and shooters are doing well in ELR.
6. Links to other ELR shooting resources such as forums and websites.

Extreme Long Range ELR Central Bryan Litz website Ballistics
On 5/13/17, the Applied Ballistics ELR Team had a successful practice at 3161 Yards (1.8 miles). Bryan Litz reports: “The main goal … was to test how the Berger and Cutting Edge bullets traveled through transonic and subsonic speeds. We all made several hits on target and several within 1 MOA of center.”

IVEY adjustable scope rings with 50 Mil travel are offered in 30mm, 34mm, 35mm, and 40mm sizes.
IVEY adjustable scope rings Extreme Long Range ELR Central Bryan Litz website Ballistics

ELR Central MGM Targets Steel Applied BallisticsStandardized ELR Targets
Another goal of ELR Central is to develop standardized ELR targetry. Bryan explains: “In competitive rifle shooting, standardization of targetry is important. Applied Ballistics, through ELR Central, will provide steel targets to organizations wishing to run ELR matches and/or record-setting events. No one would be required to use these standard targets, we’re simply providing resources to help promote promote some consistency.” The initial standard target, produced by MGM Targets, will be a steel square, 3 feet (36″) per side.

ELR Central is Not A Rule-Making Entity
Bryan was quick to explain that ELR Central is not a governing body, but rather it was created to help advance the sport (and science) of shooting at very long distances, one mile and beyond: “The concept of ELR Central is a result of the ongoing discussions about standardizing ELR matches, records, targets, and more. Although ELR Central will not be enforcing these details, there is a measure of organization which we feel is appropriate, would benefit the sport, and that we are willing to provide. ELR Central is NOT a governing or sanctioning body. We do not have nor seek the authority to dictate how matches are run. For anyone who asks, we can advise on best practices, and what’s generally working, but we’re not here to tell anyone what to do nor how to do it.”


More Information on ELR Competition, per ELR Researcher:

(1) By consensus of the parties involved in the ELR meetings held at SHOT this year, and notwithstanding the names and descriptions of certain “ELR” web sub-forums, “ELR” has been defined as “beyond 1500 yards”.
(2) ELR Central-recognized “ELR” events require that more than one-half of targets must be beyond 1500 yards. Where all criteria are not met an event may be promoted as having “ELR components”.
(3) “ELR Central has published a set of guidelines and standards by which official world records can be established.” CLICK HERE for guidelines/standards.

Story tip from EdLongrange. We welcome reader submissions.
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May 4th, 2017

Get Most Popular Ballistics App for iOS at Half Price

Ballistic AE Moble App Ballistics Program solver JBM iphone, iPod, iPad

Ballistic AE Moble App Ballistics Program solver JBM iphone, iPod, iPadNeed a top-notch Ballistics App for your iPhone, iPad, or iPod? Start with Ballistic AE, the number 1 (i.e. most installed) App for iOS systems. Ballistics AE (Advanced Edition) is the most popular iOS ballistics program for many good reasons. Full-featured and easy to use, Ballistics AE has been refined over many years, and it supplies rock-solid solutions derived from JBM Ballistics solver (created by James B. Millard). Unlike some other Apps, Ballistics AE is STABLE on iPhones (with various OS levels). What’s cool is that Ballistics AE is now on sale for $14.99, 50% off the regular $29.99 price.

We’ve used the Ballistic AE program on an iPhone 5S, iPhone 6, and iPad, and it performed well. Here are some of the features we liked:

  • 1. Mirrors output from online version of JBM Ballistics we often use for initial calculations.
  • 2. Controls are simple to use and (mostly) intuitive.
  • 3. Handy comparison feature lets you compare ballistics for different projectiles side by side.
  • 4. Advanced Wind Kit allows you to account for complex wind situations.
  • 5. Projectile and BC Database is very comprehensive.
  • 6. Software is regularly updated to match Apple OS changes.

Ballistic-AE for iPhone, iPad, iPod, $14.99 (Sale) | Ballistic for iPad, $14.99 (Sale)

Ballistic AE Moble App Ballistics Program solver JBM iphone, iPod, iPad

Comprehensive Projectile Info and BCs
Ballistics AE has very complete data libraries. The program includes 5,000 projectiles, factory loads, military loads, and performance data points from leading manufacturers, military testing, and performance testing.

Ballistic Coefficient libraries include the latest commercial BC data, plus Applied Ballistics’ (Bryan Litz) custom G7 BCs, plus G7 military coefficients from Aberdeen Proving Grounds.

Ballistic AE Moble App Ballistics Program solver JBM iphone, iPod, iPad

These Videos Explain How to Set Up and Use Ballistic AE:

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May 2nd, 2017

Interview with Bryan Litz — Insight into a Champion

Bryan Litz Interview Applied Ballistics Mia Lee Rhode Shooters wife

There’s a great interview with Bryan Litz of Applied Ballistics on Mia Rhode’s Life Of A Shooter’s Wife Blog. We recommend you read the full interview. Bryan offers many important insights that can benefit any precision shooter. It’s fascinating to learn about Bryan’s background and how he progressed in competitive shooting, starting with very basic equipment. As a “broke high school kid”, he got started on the cheap, paying for gear with wages from McDonald’s. Now he’s a globally-recognized expert in Ballistics and Long Range precision. You’ll enjoy reading the Full Interview. Here are some highlights…

» Read Full Interview with Bryan Litz

Bryan Litz Interview Applied Ballistics Mia Lee Rhode Shooters wifeLOASW: When did you first become interested in shooting?

Bryan: My first memories of shooting were at the age of about 9 or 10. Pellet rifle in the back yard. My Dad taught me to shoot, stressing the importance of accuracy. I was driven to hit targets, mostly small targets at long distance. My grandfather was on the All-Army shooting team back in the ‘50s, and was distinguished in both rifle and pistol. Shooting is part of my family’s DNA and I benefited from that from a young age.

LOASW: What sparked your interest in Competitive Shooting and how old were you when you started competing?

Bryan: Hunting groundhogs in the farm-fields of Pennsylvania through high school is where I truly connected with long-range shooting. My Dad heard of a competition range (The Original Pennsylvania 1000 Yard Benchrest Club in Williamsport, PA). So we visited there one summer and I immediately found my trusty 22-250 inadequate for the job of 1000-yard benchrest shooting. So I saved my McDonald’s wages until I could afford a 7mm Remington Magnum and began competing in my first matches at the age of 15.

Learning with Limited Resources…
… It was a huge mis-match to my situation because benchrest is a highly gear-driven sport, and the winners typically have many $1000s of dollars wrapped up in equipment. I was a broke high school kid who needed my parents to drive me to the range my first year, and my second year, I had to rely on fellow competitors to jump start my old pick-up truck that was always breaking down. Nevertheless I enjoyed the hell out of shooting 1000 yards. I can honestly say that I don’t have any more FUN shooting these days with all the best equipment as compared to those bad ‘ol days when I had maybe $900 total wrapped up in all my gear. Those who remember me from those early days might recall the home-made shooting rest and McDonalds French fry box that I carried all my gear in. Later when I picked up prone/sling shooting, my shooting mat was a piece of carpet (pink, no less), and my shooting coat was a military field jacket with belts sewn in it.

Money was probably my biggest challenge when I started out. I had plenty of fun with my budget kit, but was certainly constrained by lack of access to quality gear. I overcame this with hard work and making the most of what I had. Learning how to mitigate the deficiencies of my equipment was an important stepping stone which has been highly valuable even now when I’ve got better stuff. It’s a good skill to have, to be able to spot something about to come unraveled.

Bryan Litz Interview Applied Ballistics Mia Lee Rhode Shooters wife

LOASW: What advice would you give to someone new to competitive shooting?

Bryan: Find a mentor, someone who lives near you who has experience and is willing to share it. You will cut years off your learning curve if you can get someone to share their experience with you who’s “been there done that”.

» CLICK HERE for REST of Interview with Bryan Litz

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April 20th, 2017

New Spin on BC — How Barrel Twist Rates Affect Bullet Drag

Bryan Litz bullet rpm BC Drag ballistics coefficient twist rate

You may not realize it… but to get the optimum BC from your bullets (i.e. the lowest aerodynamic drag), you must spin the bullets fast enough. Bullet drag increases (as expressed by lower BC) if the bullet spins too slowly. Bryan Litz of Applied Ballistics explains how BC changes with twist rates…

More Spin, Less Drag
In this article, we look at how twist rate and stability affect the Ballistic Coefficient (BC) of a bullet. Again, this topic is covered in detail in the Modern Advancements book. Through our testing, we’ve learned that adequate spin-stabilization is important to achieving the best BC (and lowest drag). In other words, if you don’t spin your bullets fast enough (with sufficient twist rate), the BC of your bullets may be less than optimal. That means, in practical terms, that your bullets drop more quickly and deflect more in the wind (other factors being equal). Spin your bullets faster, and you can optimize your BC for best performance.

Any test that’s designed to study BC effects has to be carefully controlled in the sense that the variables are isolated. To this end, barrels were ordered from a single barrel smith, chambered and headspaced to the same rifle, with the only difference being the twist rate of the barrels. In this test, 3 pairs of barrels were used. In .224 caliber, 1:9” and 1:7” twist. In .243 caliber it was 1:10” and 1:8”, and in .30 caliber it was 1:12” and 1:10”. Other than the twist rates, each pair of barrels was identical in length, contour, and had similar round counts. Here is a barrel rack at the Applied Ballistics Lab:

Applied Ballistics used multiple barrels to study how twist rate affects BC.

stability gyroscopic ballistics coefficient drag twist rate

“The Modern Advancements series is basically a journal of the ongoing R&D efforts of the Applied Ballistics Laboratory. The goal of the series is to share what we’re learning about ballistics so others can benefit.” –Bryan Litz

Barrel twist rate along with velocity, atmospherics, and bullet design all combine to result in a Gyroscopic Stability Factor (SG). It’s the SG that actually correlates to BC. The testing revealed that if you get SG above 1.5, the BC may improve slightly with faster twist (higher SG), but it’s very difficult to see. However, BC drops off very quickly for SGs below 1.5. This can be seen in the figure below from Modern Advancements in Long Range Shooting.

The chart shows that when the Gyroscopic Stability Factor (SG) is above 1.5, BC is mostly constant. But if SG falls below 1.5, BC drops off dramatically.
stability gyroscopic ballistics coefficient drag twist rate

Note that the BC drops by about 3% for every 0.1 that SG falls below 1.5. The data supports a correlation coefficient of 0.87 for this relationship. That means the 3% per 0.1 unit of SG is an accurate trend, but isn’t necessarily exact for every scenario.

It’s a common assumption that if a shooter is seeing great groups and round holes, that he’s seeing the full potential BC of the bullets. These tests did not support that assumption. It’s quite common to shoot very tight groups and have round bullet holes while your BC is compromised by as much as 10% or more. This is probably the most practical and important take-away from this test.

To calculate the SG of your bullets in your rifle, visit the Berger Bullets online stability calculator. This FREE calculator will show you the SG of your bullets, as well as indicate if your BC will be compromised (and by how much) if the SG is below 1.5. With the stated twist rate of your barrel, if your selected bullet shows an SG of 1.5 (or less), the calculator will suggest alternate bullets that will fully stabilize in your rifle. This valuable online resource is based directly on live fire testing. You can use the SG Calculator for free on the web — you don’t need to download software.


Learn More About SG and BC
Barrel Twist Rate Velocity Modern Advancements Book Bryan Litz Applied BallisticsThis article is just a brief overview of the interrelated subjects of twist rate, Gyroscopic Stability, and BC. The coverage of twist rates in Modern Advancements in Long-Range Shooting is more detailed, with multiple live fire tests.

Other chapters in the book’s twist rate section include:
· Stability and Drag – Supersonic
· Stability and Drag – Transonic
· Spin Rate Decay
· Effect of Twist rate on Precision

Other sections of the book include: Modern Rifles, Scopes, and Bullets as well as Advancements in Predictive Modeling. This book is sold through the Applied Ballistics online store. Modern Advancements in Long Range Shooting is also available in eBook format in the Amazon Kindle store.

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April 6th, 2017

Going Big (.338 and Beyond) — Big Bore Basics with Bryan Litz

Big Bore Bryan Litz Applied Ballistics .416 Barrett .376 CheyTac .408 CheyTac .50 BMG BC Solid Bullets

In this video Bryan Litz of Applied Ballistics offers tips on Big Bore shooting (i.e. .338 caliber and above). Bryan offers advice on bullet selection and he explains the challenge of handling the blast, noise, concussion, and recoil of big boomers such as the .416 Barrett and .50 BMG.

Bryan goes big … very big, shooting a monster .50 BMG bullpup.
Watch the recoil pulse shove Bryan backwards at 1:40 time-mark:

Big Bore Basics — Tips for Shooting Big Boomers by Bryan Litz
There are some unique things to consider with big-bore shooting. One is bullet design. For long-range shooting you want high-BC bullets. You get high BC from heavy bullets and bullets that have low drag. The interesting trade-off in big calibers is that there are a lot more lathe-turned solid bullets in copper and brass available than there are in the smaller calibers. You’ve got bullets that have slightly lower drag profiles but they are made of materials that are slightly less dense (than lead) so they are relatively light for their caliber. With that trade-off, the BCs might not be as high as you think for big calibers, although the bullets are heavy enough that they carry a lot of energy.

Energy really has a lot to do with shooting these big-caliber rifles. As with any kind of shooting, the fundamentals of marksmanship are the most important thing. However, it can be hard to maintain good fundamentals (e.g. trigger control and sight alignment) when you’re burning 100 grains of powder. There’s a lot of concussion (you want a muzzle brake no matter what your cartridge is above .338). It certainly can be challenging with all the muzzle blast and all the energy coming out of the barrel.

For long-range shooting with big bore rifles, you are still looking for the same things that you want with smaller-caliber rigs. You want a high-performance bullet, you want consistent ammunition, and you want a good fire solution to be able to center your group at long range. Basically you’re just dealing with the challenges that the high energy brings, and being smart about your bullet selection.

Big Bore Bryan Litz Applied Ballistics .416 Barrett .376 CheyTac .408 CheyTac .50 BMG BC Solid Bullets

In the video above, Bryan is shooting the DesertTech HTI bullpup. This rifle can shoot four (4) big bore chamberings, with barrel conversion kits for: .375 CheyTac, .408 CheyTac, .416 Barrett, and .50 BMG. These can be quickly swapped in the HTI chassis, which employs an internal barrel-clamp system.

Big Bore Bryan Litz Applied Ballistics .416 Barrett .376 CheyTac .408 CheyTac .50 BMG BC Solid Bullets

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March 24th, 2017

Verify Your TRUE Scope Click Values with Tall Target Test

Scope Click Verify Elevation Tall Target Bryan Litz NSSF test turret MOA MIL

Have you recently purchased a new scope? Then you should verify the actual click value of the turrets before you use the optic in competition (or on a long-range hunt). While a scope may have listed click values of 1/4-MOA, 1/8-MOA or 0.1 Mils, the reality may be slightly different. Many scopes have actual click values that are slightly higher or lower than the value claimed by the manufacturer. The small variance adds up when you click through a wide range of elevation.

In this video, Bryan Litz of Applied Ballistics shows how to verify your true click values using a “Tall Target Test”. The idea is to start at the bottom end of a vertical line, and then click up 30 MOA or so. Multiply the number of clicked MOA by 1.047 to get the claimed value in inches. For example, at 100 yards, 30 MOA is exactly 31.41 inches. Then measure the difference in your actual point of impact. If, for example, your point of impact is 33 inches, then you are getting more than the stated MOA with each click (assuming the target is positioned at exactly 100 yards).

Scope Click Verify Elevation Tall Target Bryan Litz NSSF test turret MOA MIL

How to Perform the Tall Target Test
The objective of the tall target test is to insure that your scope is giving you the proper amount of adjustment. For example, when you dial 30 MOA, are you really getting 30 MOA, or are you getting 28.5 or 31.2 MOA? The only way to be sure is to verify, don’t take it for granted! Knowing your scopes true click values insures that you can accurately apply a ballistic solution. In fact, many perceived inaccuracies of long range ballistics solutions are actually caused by the scopes not applying the intended adjustment. In order to verify your scope’s true movement and calculate a correction factor, follow the steps in the Tall Target Worksheet. This worksheet takes you thru the ‘calibration process’ including measuring true range to target and actual POI shift for a given scope adjustment. The goal is to calculate a correction factor that you can apply to a ballistic solution which accounts for the tracking error of your scope. For example, if you find your scope moves 7% more than it should, then you have to apply 7% less than the ballistic solution calls for to hit your target.


CLICK HERE to DOWNLOAD Tall Target Worksheet (PDF)

NOTE: When doing this test, don’t go for the maximum possible elevation. You don’t want to max out the elevation knob, running it to the top stop. Bryan Litz explains: “It’s good to avoid the extremes of adjustment when doing the tall target test.I don’t know how much different the clicks would be at the edges, but they’re not the same.”

Should You Perform a WIDE Target Test Too?
What about testing your windage clicks the same way, with a WIDE target test? Bryan Litz says that’s not really necessary: “The wide target test isn’t as important for a couple reasons. First, you typically don’t dial nearly as much wind as you do elevation. Second, your dialed windage is a guess to begin with; a moving average that’s different for every shot. Whereas you stand to gain a lot by nailing vertical down to the click, the same is not true of windage. If there’s a 5% error in your scope’s windage tracking, you’d never know it.”

Scope Tall Test level calibrationVerifying Scope Level With Tall Target Test
Bryan says: “While setting up your Tall Target Test, you should also verify that your scope level is mounted and aligned properly. This is critical to insuring that you’ll have a long range horizontal zero when you dial on a bunch of elevation for long range shots. This is a requirement for all kinds of long range shooting. Without a properly-mounted scope level (verified on a Tall Target), you really can’t guarantee your horizontal zero at long range.”

NOTE: For ‘known-distance’ competition, this is the only mandatory part of the tall target test, since slight variations in elevation click-values are not that important once you’re centered “on target” at a known distance.

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March 2nd, 2017

Shooting FAILS — Why Marksmen Miss at Long Range

Bryan Litz Applied Ballistics Long Range Shooting Error Wind Call Kestrel Laser Rangefinder

Applied Ballistics has produced a series of YouTube videos about precision long range shooting. Featuring ace long-range shooter and professional ballistician Bryan Litz, these videos address various topics of interest to long-range marksmen. This featured video looks at Long Range mistakes — Bryan Litz reveals the most common ballistics-related shooting errors at Long Range. And then Bryan explains how to improve your shooting (and wind reading) to eliminate those common errors.

Watch Applied Ballistics Video about Common Mistakes in Long Range Shooting:

Bryan Litz of Applied Ballistics often hears the question: “What are the main reasons people miss their target at long range?” To answer that question, in this video, Bryan explains the most important variables in Long Range shooting. Bryan says: “Probably the number one thing is range — you have to have a [precise] range to your target because your bullet is dropping, and to hit the target you need to correct for bullet drop.” Distance may be indicated on the target bay (or berm), but for open ranges you should ascertain distance-to-target with a quality laser rangefinder. Even when the distance to target is shown with a sign or marker, you may want to confirm the distance with your rangefinder. (You may be surprised — we’ve seen marked target distances at commercial ranges off by 25+ yards!) Bryan says: “Get a good laser range to the target and you’ll be within a couple yards”.

Bryan Litz Applied Ballistics Long Range Shooting Error Wind Call Kestrel Laser Rangefinder

After distance to target, the most important variable is the wind. This is the most challenging factor because the wind is constantly changing. Bryan explains: “After 300 or 400 yards, the wind [will] move your shots off the target if you don’t correct for it. The best way to account for the wind is to measure it at your location with a Kestrel. The Kestrel can give you the speed and direction of the wind at your location, which can baseline your wind call for your long-range shot.” Bryan acknowledges that there will still be variables: “The wind isn’t always blowing the same downrange as at your location… and the wind is always changing”. Bryan notes that you need to account for variances in wind between the time you gauge the wind angle and velocity and the time you actually you take your shot.

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February 12th, 2017

Bullet Pointing 101 — How to Point Match Bullet Tips

Berger Bullet Pointing Applied Ballistics Bryan Litz Whidden Pointing Die pointer

Tech Tip by Doc Beech, Applied Ballistics Support Team
I am going to hit on some key points when it comes to bullet pointing. How much pointing and trimming needed is going to depend on the bullet itself. Specifically how bad the bullets are to begin with. Starting out with better-quality projectiles such as Bergers is going to mean two things. First that you don’t need to do as much correction to the meplat, but also that the improvement is going to be less. NOTE: We recommend you DO NOT POINT hunting bullets. Pointing can affect terminal performance in a bad way.

NOTE the change in the bullet tip shape and hollowpoint size after pointing:
Berger Bullet Pointing Applied Ballistics Bryan Litz Whidden Pointing Die pointer

Don’t Over-Point Your Bullets
What is important here is that you never want to over-point. It is far better to be safe, and under-point, rather than over-point and crush the tips even the slightest bit. To quote Bryan Litz exactly: “Best practice is to leave a tiny air gap in the tip so you’re sure not to compress the metal together which will result in crushing. Most of the gain in pointing is taking the bullet tip down to this point. Going a little further doesn’t show on target”. So in essence you are only bringing the tip down a small amount… and you want to make sure you leave an air gap at the tip.

Salazar Whidden Bullet Pointer system

Also keep in mind, bullet pointing is one of those procedures with variable returns. If you only shoot at 100-200 yards, bullet pointing will likely not benefit you. To see the benefits, which can run from 2 to 10% (possibly more with poorly designed bullets), you need be shooting at long range. Bryan says: “Typically, with pointing, you’ll see 3-4% increase in BC on average. If the nose is long and pointy (VLD shape) with a large meplat, that’s where pointing has the biggest effect; up to 8% or 10%. If the meplat is tight on a short tangent nose, the increase can be as small as 1 or 2%.” For example, If you point a Berger .308-caliber 185gr Juggernaut expect to only get a 2% increase in BC.

Berger Bullet Pointing Applied Ballistics Bryan Litz Whidden Pointing Die pointer

Should You Trim after Pointing?
Sometimes you can see tiny imperfections after pointing, but to say you “need” to trim after pointing is to say that the small imperfections make a difference. Bryan Litz advises: “If your goal is to make bullets that fly uniformly at the highest levels, it may not be necessary to trim them.” In fact Bryan states: “I’ve never trimmed a bullet tip, before or after pointing”. So in the end it is up to you to decide.

Pointing is Easy with the Right Tools
The process of pointing in itself is very simple. It takes about as much effort to point bullets as it does to seat bullets. We are simply making the air gap on the tip of the bullet ever-so smaller. Don’t rush the job — go slow. Use smooth and steady pressure on the press when pointing bullets. You don’t want to trap air in the die and damage the bullet tip. You can use most any press, with a caliber-specific sleeve and correct die insert. The Whidden pointing die has a micrometer top so making adjustments is very easy.

Bryan Litz actually helped design the Whidden Bullet Pointing Die System, so you can order the Pointing Die and Inserts directly from Applied Ballistics. Just make sure that you pick up the correct caliber sleeve(s) and appropriate insert(s). As sold by Applied Ballistics, the Whidden Bullet Pointing Die System comes with the die, one tipping insert, and one caliber-specific sleeve. To see which insert(s) you need for your bullet type(s), click this link:

LINK: Whidden Gunworks Pointing Die Insert Selection Chart

Permalink Bullets, Brass, Ammo, Reloading 1 Comment »
February 9th, 2017

Ballistics Brain Power — Take Our Ballistics Quiz

Ballistics Quiz Bryan Litz Applied Ballistics

At the Berger SW Nationals this week in Phoenix, the nation’s top long-range shooters will try to put all their shots in the 10-Ring at 800, 900, and 1000 yards. A good foundation in ballistics is vital if you want to succeed in the long-range game.

How much do you know about BCs, Bullet Shapes, Trajectories, Wind Drift, and other things in the realm of External Ballistics? You can test your knowledge of basic Ballistics principles with this interactive quiz. The questions and answers were provided by Ballistics Guru Bryan Litz of Applied Ballistics LLC. Bryan is the author of Applied Ballistics for Long-Range Shooting and other popular resources in print, DVD, and eBook format. Have fun with our Quiz.

The Quiz contains ten (10) questions. When you complete all ten questions, you can see your results, along with the correct answers.

Permalink Bullets, Brass, Ammo, Tech Tip 2 Comments »
February 3rd, 2017

New Video Series from Applied Ballistics

Bryan Litz Applied Ballistics Long Range Shooting Video Youtube elevation transonic supersonic

Applied Ballistics has created a series of YouTube videos about precision long range shooting. Featuring ace long-range shooter and professional ballistician Bryan Litz, these videos will address various topics of interest to long-range marksmen. In this video, the first in the series, Bryan Litz answers the question, “Just What Is Long Range Shooting?” Bryan discusses how we define “long range” and the key factors shooters need to consider.

Applied Ballistics Video — What Is Long Range Shooting?

Bryan states: “I don’t think there is a clear definition of where Long Range starts.” But he offers this practical guideline: “The way I think of it, any time you’re making major adjustments to your zero in order to hit a target, due to gravity drop and wind deflection, THEN you’re getting into ‘Long Range’. For example, if you are zeroed at 100 yards and need to shoot to 600 yards, you have many feet of elevation [drop] to account for, and to me, that’s where it becomes Long Range.”

Extended Long Range and the Transonic Zone
Bryan adds a second concept, namely “Extended Long Range”. Litz says that: “Extended Long Range starts whenever the bullet slows to its transonic range. As the bullet slows down to approach Mach 1, it starts to encounter transonic effects, which are more complex and difficult to account for, compared to the supersonic range where the bullet is relatively well-behaved.” Bryan notes that bullets start to encounter transonic effects at about 1340 fps, quite a bit faster than the speed of sound, which is about 1116 fps at sea level in normal conditions (59° F).

Bryan Litz Applied Ballistics Long Range Shooting Video Youtube elevation transonic supersonic

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January 21st, 2017

Six by Litz — Tips for Shooting Long-Range

Berger Southwest SW SWN Nationals Ben Avery Bryan Litz

Berger SW Nationals Bryan LitzWith the Berger Southwest Nationals coming up soon (Feb. 6-12), we thought we would share some tips from a past Champion who really knows the Ben Avery range in Phoenix. In 2015, Bryan won the F-TR Mid-Range AND Long-Range National Championships hosted at Ben Avery. And at the 2014 Berger SW Nationals (SWN), Bryan took top honors among all sling shooters. If you only know Bryan Litz from his Applied Ballistics Books and DVDs, you may not realize that this guy is a great marksman (along with being an actual rocket scientist). This guy can shoot.

Given his impressive track record at Ben Avery, we asked Bryan if he had any advice for other long-range competitors. First Bryan provided three tips concerning Ballistics, his special area of expertise. Next Bryan offered three more general tips about long-range competition — how to analyze your shooting, how to choose your ‘wind strategy’, and how to avoid the most costly mistakes, i.e. how to avoid the “train-wrecks”.

Here is the sleek F-TR Rig Bryan Litz used to win the 2015 F-TR Mid-Range and Long-Range Championships at Ben Avery:
Bryan Litz F-TR Ben Avery Berger SW Nationals

Litz Ballistics Tips

Ballistics TIP ONE. If you’re having trouble getting your ballistic software to match actual drops, you need to look at a number of possible reasons. Here are some common issues that can cause problems.

Click Values Are Not Exact. Scopes and iron sights don’t always produce accurate adjustments. In other words, if your ballistics program predicts 30 MOA of drop, and you dial 30 MOA but hit low, it might be that your sight actually only moved 28 MOA (for example). To see if your sight is adjusting accurately, shoot a tall target at 100 yards and measure group separation when dialing your sight.

Barometric vs. Station Pressure. This is a commonly misunderstood input to ballistics programs. You can avoid this pitfall by remembering the following: station pressure is the actual measured pressure at your location, and you don’t need to tell the program your altitude when using station pressure. Barometric pressure is corrected for sea level. If you’re using barometric pressure, you also have to input your altitude.

Muzzle Velocity. Chronographs are not always as accurate as shooters think they are — your true MV may be off by 10-20 fps (or more). If your drop is different than predicted at long range, it might be because your muzzle velocity input is wrong.

Mixing Up BC (G1 vs. G7). Knowledgeable long range shooters know that the G7 standard is a more representative standard for modern LR bullets. However, using G7 BCs isn’t just a matter of clicking the ‘G7′ option in the program. The numeric value of the BC is different for G1 and G7. For example, the G1 BC of the Berger 155.5 grain Fullbore bullet is .464 but the G7 BC is .237. If you were to enter .464 but click on G7, the results would be way off.

Ballistics TIP TWO. A properly installed level is absolutely essential for long range shooting. Without a good level reference, your long range wind zero will be off due to minor canting of the rifle from side to side. You can verify that your level is installed correctly on a 100-yard ‘tall target’. Draw a plumb line straight up the target and verify that your groups track straight up this line as you go up in elevation.

Ballistics TIP THREE. If your long range ballistic predictions aren’t tracking, always come back and verify your 100-yard zero. Sometimes a simple zero shift can be misconstrued as errors in long range ballistics predictions.

Bryan Litz Tips

Litz Competition Shooting Tips

Competition TIP ONE. Improving your scores in long range competition is a constant process of self-assessment. After each match, carefully analyze how you lost points and make a plan to improve. Beginning shooters will lose a lot of points to fundamental things like sight alignment and trigger control. Veteran shooters will lose far fewer points to a smaller list of mistakes. At every step along the way, always ask yourself why you’re losing points and address the issues. Sometimes the weak links that you need to work on aren’t your favorite thing to do, and success will take work in these areas as well.

Competition TIP TWO. Select your wind shooting strategy carefully. For beginners and veterans, most points are typically lost to wind. Successful shooters put a lot of thought into their approach to wind shooting. Sometimes it’s best to shoot fast and minimize the changes you’ll have to navigate. Other times it’s best to wait out a condition which may take several minutes. Develop a comfortable rest position so you have an easier time waiting when you should be waiting.

Competition TIP THREE. Actively avoid major train wrecks. Sounds obvious but it happens a lot. Select equipment that is reliable, get comfortable with it and have back-ups for important things. Don’t load on the verge of max pressure, don’t go to an important match with a barrel that’s near shot out, physically check tightness of all important screws prior to shooting each string. Observe what train wrecks you and others experience, and put measures in place to avoid them.

“Must-Watch” SWN Video has aerial view of Ben Avery plus highlights from Saturday

Bryan Litz Tips

Photos by Steve Fiorenzo

Permalink Bullets, Brass, Ammo, Shooting Skills 2 Comments »
December 29th, 2016

Seating Strategies: How to Optimize Your Hybrid Bullets

Berger Hybrid Bullet

SHOT Show 2017 kicks off in thre weeks in Las Vegas. While at SHOT Show next month, we plan to get the “inside scoop” on new bullet designs from Berger, Hornady, Lapua, Nosler and Sierra.

A while back, at SHOT Show 2012 we chatted with Berger Ballistician Bryan Litz about Berger’s popular line of Hybrid bullets. Berger now offers a wide range of Hybrids in multiple calibers and weights. In fact, for .30-Caliber shooters, Berger now offers many seven (7) Hybrid match bullets, with weights from 155 grains up to 230 grains. Two .338-caliber OTM Tactical Hybrids were introduced in 2012 (a 250-grainer and a 300-grainer).

Bryan tells us: “The hybrid design is Berger’s solution to the age old problem of precision vs. ease of use. This design is making life easier for handloaders as well as providing opportunities for commercial ammo loaders who need to offer a high performance round that also shoots precisely in many rifles with various chamber/throat configurations.”

For those not familiar with Hybrid bullets, the Hybrid design blends two common bullet nose shapes on the front section of the bullet (from the tip to the start of the bearing surface). Most of the curved section of the bullet has a Secant (VLD-style) ogive for low drag. This then blends in a Tangent-style ogive curve further back, where the bullet first contacts the rifling. The Tangent section makes seating depth less critical to accuracy, so the Hybrid bullet can shoot well through a range of seating depths, even though it has a very high Ballistic Coefficient (BC).

In the video we asked Bryan for recommended seating depths for 7mm and .30-Caliber Hybrid bullets. Bryan advises that, as a starting point, Hybrid bullets be seated .015″ (fifteen thousandths) off the lands in most barrels. Watch the video for more tips how to optimize your loads with Hybrid bullets.

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December 6th, 2016

TEN TITLES for Christmas — Great Gift Books For Shooters

AccurateShooter Christmas Book List recommended shooting books

Christmas is coming soon. Books have always been popular holiday gifts. If you haven’t completed your holiday shopping, here are some recommended titles that should please the serious shooters and firearms enthusiasts on your shopping list. For shooting clubs, books also make great end-of-season member awards. Most of us would rather have a useful book than one more piece of wood to toss in a box in the closet.

Here Are TEN BOOKS Recommended for Serious Shooters:

Top-Grade Ammo
by Glen Zediker, $34.95 (Softcover)

Glen Zediker’s brand new book, Top-Grade Ammo, is hot off the press. Many folks believe this is Glen’s best book ever. This 314-page resource covers every aspect of the reloading process — component sorting, priming, sizing, bullet seating and more. With 430 photos, Top-Grade Ammo is a richly-illustrated, step-by-step guide to producing high-quality handloads. Unlike many reloading books, Top-Grade Ammo is truly current and up-to-date, so it covers modern practices and the latest precision reloading tools. While Zediker focuses on producing match-grade ammo for competition, this book will also help novice reloaders on a budget. It’s written for all hand-loaders — beginners through advanced. This book features a special “lay-flat” binding so it’s easy to use as a benchtop reference. To view Chapter List and sample pages visit ZedikerPublishing.com.

Modern Advancements in LR Shooting
by Bryan Litz, $27.99 (Kindle), $43.95 (Hardcover)

If you’re a serious long-range shooter, consider adding this book to your library. Relying on extensive ballistics testing, Modern Advancements contains some fascinating research results, including the effects of twist rate on muzzle velocity, BC, and precision. Other sections detail the evolution of modern rifle, bullet, and optics designs. And there is an important comparison test of chronographs. Laser rangefinders and wind measurement devices are explained in detail by contributing author Nick Vitalbo. This book is a valuable resource for anyone who wants to understand the current “state of the art” in today’s shooting world. There is a ton of “hard science” in this book — not just opinions.

mike ratigan book Extreme Rifle Accuracy
by Mike Ratigan, $35.65 (Softcover)

This book should be on the shelf of every short-range benchrest shooter. (Shooters in other disciplines will find the book helpful as well.) Butch Lambert says Mike’s book is “far and away the best Benchrest book written. Very comprehensive, it touches on every aspect of our game.” Mike’s 368-page book is dedicated to getting the most from modern rifle accuracy equipment with an emphasis on shooting 100-200-300 yard group benchrest tournaments. This book covers the most popular hardware plus new equipment offerings are covered, including external mount scopes, actions, triggers, stocks, wind flags, and more. Also covered are rifle handling techniques, note taking, tuning, bullet selection, goals, and match strategies. Mike provides many tips that will help active competitors update their own competitive program.

Nancy Tompkins Long Range book Prone and Long-Range Rifle Shooting
by Nancy Tompkins, $45.00, (Hardcover, 2d Edition).

Nancy Tompkins is one of the greatest long-range shooters in American history. She has won five National Long-range Championships. Tompkins’ treatise is a must-read for serious Palma, F-Class, and High Power shooters. The revised Second edition includes F-Class equipment and techniques, and newly updated information. Color pictures. Topics include Mental & Physical training, Reading Wind & Mirage Shooting Fundamentals, International Competition, and Loading for Long Range. Nancy Tompkins is a 4-time winner of the National Long Range Championships, and has won countless other major events. Nancy has been on six Palma Teams (as both a shooter and a coach).

Tony Boyer Book rifle accuracy benchrest Long Range Shooting Handbook
by Ryan Cleckner, $24.95 (list); $10.67 (Softcover, Amazon Price), $9.99 (Kindle)

Ryan Cleckner is noted for his ability to explain complex topics in an easy-to-comprehend manner. Now Cleckner has authored a book, the Long Range Shooting Handbook, which expands on the topics covered in Cleckner’s popular NSSF video series. The Long Range Shooting Handbook is divided into three main categories: What It Is/How It Works, Fundamentals, and How to Use It. “What It Is/How It Works” covers equipment, terminology, and basic principles. “Fundamentals” covers the theory of long range shooting. “How to Use It” gives practical advice on implementing what you’ve learned, so you can progress as a skilled, long range shooter. You can view Sample Chapters from Ryan’s Book on Amazon.com.

Tony Boyer Book rifle accuracy benchrest The Book of Rifle Accuracy
by Tony Boyer, $34.50 (Softcover); $42.50 (Hardcover).

Tony Boyer, the most successful shooter in the history of short-range benchrest competition, shares many of his match-winning tips in this 323-page book. The book covers all aspect of the benchrest discipline: loading, windflags, rest set-up, addressing the rifle, and match strategies. This is a high-quality publication, filled with valuable insights. Every serious benchrest shooter should read Tony’s book. Boyer has dominated registered benchrest in a fashion that will never be duplicated, having amassed 142 U.S. Benchrest Hall of Fame points. The next closest shooter, Allie Euber, has 47 Hall of Fame points. This handsome, full-color book is 323 pages long, with color photos or color illustrations on nearly every page.

David Tubb High Power Rifle The Rifle Shooter
by G. David Tubb, $34.95 (Softcover)

This book by 11-time National High Power Champion David Tubb focuses on position shooting and High Power disciplines. Section One covers fundamentals: position points, natural point of aim, breathing, triggering mechanics and follow-through, sling selection and use, getting started, getting better, avoiding obstacles. Section Two covers mechanics of offhand, sitting, and prone positions. Section Three covers shooting skills, including wind reading and mental preparation. Section Four covers the technical side of shooting, with extensive disuctions of rifle design, load development, reloading barrel maintenance, and rifle fitting. We consider this book a “must-read” for any sling shooter, and there is plenty of good advice for F-Class shooters too.

Bullseye Midnd Raymond Prior Creedmoor Sports Bullseye Mind
(Mental Toughness for Sport Shooting)
by Dr. Raymond Prior, $17.95 (Softcover).

Having a Bullseye Mind means thinking in ways that create confidence and consistency, even under pressure. A “must-read” for competitive shooters, Bullseye Mind is a mental training book written specifically for the shooting sports. The book is well-organized, with handy highlighted lists and key “talking points”. Each chapter concludes with examples from a world-class shooters such as: Matt Emmons, 2004 Olympic Gold Medalist; Vincent Hancock, 2-time Olympic Gold Medalist; Jamie Corkish, 2012 Olympic Gold Medalist; Petra Zublasing, 2014 World Champion/ISSF Shooter of the Year; and Nicco Campriani, 2012 Olympic Gold Medalist, 2010 World Champion. This book has earned rave reviews from competitive shooters who found it really helped their “Mental Game”. One recent purchaser states: “This book is as though you had a coach in your back pocket…”

Miller Cunningham Wind Book The Wind Book for Rifle Shooters
by Linda Miller and Keith Cunningham, $20.53 (Softcover).

Many of our Forum members have recommended The Wind Book for Rifle Shooters by Linda Miller and Keith Cunningham. This 146-page book, published in 2007, is a very informative resource. But you don’t have to take our word for it. If you click this link, you can read book excerpts on Amazon.com. This lets you preview the first few chapters, and see some illustrations. Other books cover wind reading in a broader discussion of ballistics or long-range shooting. But the Miller & Cunningham book is ALL about wind reading from cover to cover, and that is its strength. The book focuses on real world skills that can help you accurately gauge wind angle, wind velocity, and wind cycles.

Boelter Book Rimfire Rifleman’s Guide to Rimfire Ammunition
by Steven Boelter, $29.95 (Softcover)

Steven Boelter’s 352-page book is a comprehensive study of all types of rimfire ammunition (including 17s and 22 mags), with over 600 photos. In a remarkable undertaking, Steven Boelter fired every brand and sample of rimfire ammo he could acquire (including .22 LR, 17 Mach 2, 17 HMR and .22 WMR), and recorded all the results. In all, Steven tested 11 brands and 137 different rimfire rounds, firing over 32,000 test rounds.

Permalink Gear Review, Reloading, Shooting Skills 1 Comment »
November 28th, 2016

Wind-Reading Tips from Champion Shooters

Shooting Sports USA

The digital archives of Shooting Sports USA magazine (SSUSA) features an Expert Forum on Wind Reading. This outstanding article on wind reading starts off with a section by ballistics guru Bryan Litz, author of Applied Ballistics for Long-Range Shooting. Then four of the greatest American shooters in history share their personal wind wisdom. Lanny Basham (Olympic Gold Medalist, author, Winning in the Wind), Nancy Tompkins (Past National HP Champion, author, Prone and Long-Range Rifle Shooting), David Tubb (11-Time Camp Perry National Champion), and Lones Wigger (Olympic Hall of Fame) all offer practical wind-reading lessons learned during their shooting careers.

CLICK HERE for Full Article in Shooting Sports USA Archive

CLICK HERE to Download Article Issue in Printable PDF Format.

Whether you shoot paper at Perry or prairie dogs in the Dakotas, this is a certified “must-read” resource on reading the wind. Here is a sample selection from the article:

Shooting Sports USA



Visit www.SSUSA.org

Shooting Sports USA magazine (SSUSA) has a modern, mobile-friendly website with tons of great content. Log on to www.ssusa.org. There you’ll find current news stories as well as popular articles from the SSUSA archives. The SSUSA website also includes match reports, gear reviews, reloading advice, plus expert marksmanship tips from the USAMU.

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November 16th, 2016

How Changes in Cartridge OAL Can Alter Pressure and Velocity

Berger Bullets COAL length cartridge

Figure 1. When the bullet is seated farther out of the case, there is more volume available for powder. This enables the cartridge to generate higher muzzle velocity with the same pressure.

Berger Bullets COAL length cartridgeEffects Of Cartridge Over All Length (COAL) And Cartridge Base To Ogive (CBTO) – Part 1
by Bryan Litz for Berger Bullets.
Many shooters are not aware of the dramatic effects that bullet seating depth can have on the pressure and velocity generated by a rifle cartridge. Cartridge Overall Length (COAL) is also a variable that can be used to fine-tune accuracy. It’s also an important consideration for rifles that need to feed rounds through a magazine. In this article, we’ll explore the various effects of COAL, and what choices a shooter can make to maximize the effectiveness of their hand loads.

Sporting Arms and Ammunition Manufacturers’ Institute (SAAMI)
Most loading manuals (including the Berger Manual), present loading data according to SAAMI (Sporting Arms and Ammunition Manufacturers’ Institute) standards. SAAMI provides max pressure, COAL and many other specifications for commercial cartridges so that rifle makers, ammo makers, and hand loaders can standardize their products so they all work together. As we’ll see later in this article, these SAAMI standards are in many cases outdated and can dramatically restrict the performance potential of a cartridge.

Bullet seating depth is an important variable in the accuracy equation. In many cases, the SAAMI-specified COAL is shorter than what a hand loader wants to load their rounds to for accuracy purposes. In the case where a hand loader seats the bullets longer than SAAMI specified COAL, there are some internal ballistic effects that take place which are important to understand.

Effects of Seating Depth / COAL on Pressure and Velocity
The primary effect of loading a cartridge long is that it leaves more internal volume inside the cartridge. This extra internal volume has a well known effect; for a given powder charge, there will be less pressure and less velocity produced because of the extra empty space. Another way to look at this is you have to use more powder to achieve the same pressure and velocity when the bullet is seated out long. In fact, the extra powder you can add to a cartridge with the bullet seated long will allow you to achieve greater velocity at the same pressure than a cartridge with a bullet seated short.

When you think about it, it makes good sense. After all, when you seat the bullet out longer and leave more internal case volume for powder, you’re effectively making the cartridge into a bigger cartridge by increasing the size of the combustion chamber. Figure 1 illustrates the extra volume that’s available for powder when the bullet is seated out long.

Before concluding that it’s a good idea to start seating your bullets longer than SAAMI spec length, there are a few things to consider.

Geometry of a Chamber Throat
The chamber in a rifle will have a certain throat length which will dictate how long a bullet can be loaded. The throat is the forward portion of the chamber that has no rifling. The portion of the bullet’s bearing surface that projects out of the case occupies the throat (see Figure 2).

Berger Bullets COAL length cartridge

The length of the throat determines how much of the bullet can stick out of the case. When a cartridge is chambered and the bullet encounters the beginning of the rifling, known as the lands, it’s met with hard resistance. This COAL marks the maximum length that a bullet can be seated. When a bullet is seated out to contact the lands, its initial forward motion during ignition is immediately resisted by an engraving force.

Seating a bullet against the lands causes pressures to be elevated noticeably higher than if the bullet were seated just a few thousandths of an inch off the lands.

A very common practice in precision reloading is to establish the COAL for a bullet that’s seated to touch the lands. This is a reference length that the hand loader works from when searching for the optimal seating depth for precision. Many times, the best seating depth is with the bullet touching or very near the lands. However, in some rifles, the best seating depth might be 0.100″ or more off the lands. This is simply a variable the hand loader uses to tune the precision of a rifle.

CLICK HERE to Read Full Article with More Info

Article sourced by EdLongrange. We welcome tips from readers.
Permalink Bullets, Brass, Ammo, Reloading 1 Comment »
November 1st, 2016

Applied Ballistics Library Updates and November Seminar in NC

Applied Ballistics Custom Drag Models G1 G7 Nosler RDF

Nosler recently introduced a new series of high-BC bullets with factory-closed meplats. Bryan Litz’s team at Applied Ballistics is now testing these new Reduced Drag Factor (RDF) projectiles to determine their performance — and specifically to see if the BCs are as high as claimed. Nosler bullet testing is underway this week and Litz hopes to bring the results to the Applied Ballistics Seminar in North Carolina later this week (November 3-4, 2016).

Applied Ballistics Seminar Fall 2016: November 3 – 4, 2016 – Caraway Conference Center
4756 Caraway Mountain Road Sophia, NC 27350; Phone: (336) 629-2374. Seminar Sign-Up.

Bryan notes: “If you live in the Southeast region, this is the last seminar for you for at least a year, possibly longer. We will most likely do the next seminars in regions not yet visited.”

Applied Ballistics Library Update
Bryan Litz is hard at work testing new projectiles: “We are currently in the middle of testing all these new offerings that have recently come out. In fact, the lab is up and running today, with some of the new Nosler RDFs going down range. Bullet measurements have been taken with our state-of-the-art digital comparator which is accurate to within 0.0001″. For example, shown below are the measured dimensions for the new Nosler RDF .308 175 grain projectile. For these new bullets, we will not only have complete BC measurements accurate to ± 1%, but we will have Custom Drag Models (CDMs) coming as well.”

Applied Ballistics Custom Drag Models G1 G7 Nosler RDF

New Data Coming Soon
Bryan hopes to present the new Nosler data at the Seminar this week in North Carolina. In addition, Bryan is developing information for the Hornady ELD bullets, G9 Competition Series solid bullets, some new Sierras, and some other projectiles not currently in the library: “Once we complete testing on all these new offerings, we will then compile the library for the next library update (which will be done across all platforms). We want to make sure that none of these new offerings are left out. For those who want to see some of the early results, come join us at this final seminar of 2016!”

Custom Drag Models
Applied Ballistics has been providing custom drag models for use in trajectory prediction for the past several years. Custom Drag Models (CDMs) for bullets are a more refined way of modeling drag for bullets because you’re not referencing a standard like G1 or G7, rather you’re using the actual measured drag of a specific bullet in a ballistic solver. This results in more accurate trajectory predictions, especially through transonic.

Applied Ballistics Custom Drag Models G1 G7 Nosler RDF

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