In discussions of ballistics, you’ll see references to “tangent”, “secant”, and “hybrid” bullet shapes. We know that, 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, secant, and hybrid ogive bullet designs, to help you understand the characteristics of these three basic 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.”
Bryan Litz Explains Hybrid Design and Optimal Hybrid Seating Depths
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.
Hybrid 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.
In today’s feature, Emil Praslick III of Team Applied Ballistics explains how to determine wind direction down range. Praslick, now retired from the U.S. Army, was an 18-time National and 2-time World Champion coach with the USAMU. Emil is consider by many to be one of America’s greatest wind readers — a master when is comes to identifying wind value and direction, and predicting wind cycles.
Video ONE: Determining the Direction of the Wind
Key Point in Video — Find the Boil
Emil explains how to determine wind direction using optic. The method is to use spotting scope, riflescope, or binoculars to look for the “Boil” — the condition in mirage when the light waves rising straight up. The wind will generate that straight-up, vertical boil in your optics when it is blowing directly at you, or directly from your rear. To identify this, traverse your scope or optics until you see the boil running straight up. When you see that vertical boil, the direction your optic is pointing is aligned with the wind flow (either blowing towards you or from directly behind you).
Video TWO: The No Wind Zero Setting
In this second video, Emil defines the “No-Wind Zero”, and explains why competitive shooters must understand the no-wind zero and have their sights or optics set for a no-wind zero starting point before heading to a match. In order to hit your target, after determining wind speed and direction, says Emil, “you have to have your scope setting dialed to ‘no wind zero’ first.”
Coach of Champions — Emil Praslick III
SFC Emil Praslick III, (U.S. Army, retired) works with Berger Bullets and Applied Ballistics. Emil served as the Head Coach of the U.S. National Long Range Rifle Team and Head Coach of the USAMU for several years. Teams coached by Emil have won 33 Inter-Service Rifle Championships. On top of that, teams he coached set 18 National records and 2 World Records. Overall, in the role of coach, Praslick can be credited with the most team wins of any coach in U.S. Military history.
There is a new, ultra-high performance 7mm projectile for F-Open and long-range competitors. Berger has introduced a new 184gr F-Open Hybrid Target bullet, which will be the official 7mm bullet of the U.S. F-Open Rifle Team. The new 184-grainer is an advancement over previous 7mm match bullets. As you can see above, the new bullet is longer and sleeker than Berger’s existing 180gr Hybrid Target bullet. The new design gives the 184gr F-Open Hybrid impressive 0.695 G1 and 0.356 G7 Ballistic Coefficients. Compare that to 0.680 G1 and 0.349 G7 for Berger’s 180gr Target Hybrid bullet.
Bryan Litz of Applied Ballistics designed the new 184gr F-Open Hybrid to be slightly heavier, slightly longer, and have a more aggressive ogive shape. This gives the new 184-grainer a ballistic advantage over Berger’s existing 7mm 180gr Hybrid and VLD Target bullet designs. This bullet complements the .30 Cal 200.20X Hybrid Target bullet that was released last year in collaboration with the U.S. F-TR Rifle Team. As with that 200.20X bullet, for the new 184gr F-Open Hybrid, Berger took a successful, existing design and optimized the ballistic profile to make it even better. Along with .284 Win and 7mm SAUM used by F-Open shooters, this bullet should work well in a variety of 7mm cartridges.
New 184gr Hybrid Bullet Tested Extensively by U.S. F-Open Rifle Team
The U.S. F-Open Rifle Team tested the 184gr F-Open Hybrids thoroughly to ensure that they performed as well on target as they did in theory. The results were very positive, and this bullet has been adopted as the official 7mm bullet for the U.S. F-Open team. “The United States Rifle Team 2021 F-Open is extremely excited about the release of the new Berger 184gr F-Open Hybrid. Many members have tested the prototype bullets with outstanding success,” says Dan Bramley, Team Captain.
Note: On the Berger website, Berger lists a recommended 1:8″-twist rate for this new bullet. However, in its June 25, 2018 product announcement, Berger states the Minimum Twist Rate is 1:9″. MSRP is $61.99 per 100-ct box, Berger Part #28408. Grafs.com price is $54.99/box.
Berger says the bullet, which should be available very soon, will work in a variety of 7mm cartridges including: 7mm-08 Rem, .284 Win (and .284 IMP), 7mm SAUM, 7mm RUM, and 7mm Rem Mag.
Berger Supports U.S. F-Open Team — $1.00 Per Box
Berger states: “F-Class is one of the fastest growing precision rifle shooting disciplines, requiring the very best precision and accuracy to compete at the top levels. Berger has always been dedicated to making the very best bullets for our shooters. To help support the U.S. F-Open Team, Berger Bullets will donate $1.00 for every box of 7mm 184gr F-Open Hybrid bullets sold towards U.S. Team expenses for the upcoming 2021 F-Class World Championships in South Africa.”
Vihtavuori markets a full line of quality, European-made powders for rifles and pistols. Finland-based Vihtavuori is operated by the same parent company, Nammo, that owns Lapua and Berger Bullets. If you haven’t tried Vihtavuori powders yet, you may be pleasantly surprised. For loading .45 ACP, our favorite powder is VV N320 — it burns clean and is very accurate. Likewise, VV makes excellent powders for rifle applications — from small varmint cartridges to large magnums.
New Reloading Data Released Vihtavuori offers free reloading data on its website, and through a free Mobile App. And now those resources are even more complete…
Last week, Vihtavuori added new reloading data for ten different cartridge types, including some of the most popular pistol and rifle cartridges. You’ll find new pistol data for 9mm Luger and .45 ACP, and extensive new load data for .223 Rem, .260 Rem, .308 Win, and .30-06 Springfield (among others). Overall the 2018 data update features over 20 new bullets, with more than 140 new lines! All new data is also available in FREE Vihtavuori Reload App for iOS and Android. The updated online information supplements Vihtavuori’s Reloading Databases, which have dedicated sections for Rifle Cartridges, Pistol Cartridges, and Cowboy Action.
New Reloading Data is available for these TEN cartridge types:
The 2018 Berger SW Nationals are now history. The fun, action, challenges, and rewards now pass into memories. Once again, the Berger SWN was a great shooting match — a great way to advance your shooting skills, reconnect with old friends, and enjoy warm weather. If you are a serious long-range shooter, this is definitely one of the best-managed, most rewarding matches on the planet. In 2018 the match “sold out” in a matter of hours. If you plan to go next year, watch for the registration notices. You don’t want to be left out.
2018 Berger Southwest Nationals Long Range Results
The SWN has three new individual champions. Congratulations to the three divisional Match Winners: Bob Sebold (F-Open), Phillip Kelley Jr. (F-TR), and Allen Thomas (Sling).
Top Five Overall – F-Open
Bob Sebold, 843-49X
Keith Glasscock, 843-38X
Jay Christopherson, 841-45X
Stephen Potter, 841-37X
James Crofts, 841-34X
Top Five Overall – F-TR
Phillip Kelley Jr., 838-35X
Ellis Berry, 837-42X
Niklas Montin, 836-35X
Peter Johns, 835-36X
Edward Shelley, 832-33X
Top Five Overall – Sling
Allen Thomas, 844-37X
Oliver Milanovic, 843-45X
Trudie Fay, 842-32X
Nancy Tompkins, 840-43X
Angus McLeod, 840-43X
The Berger SW Nationals are made possible through the principal support of Berger Bullets and Lapua, both part of the Capstone Precision Group, which also distributes Vihtavuori powder and SK Ammunition in the USA. Berger and Lapua both generously donated product prizes for 2018 SWN competitors.
Today’s Champions… And Tomorrow’s New Talent
Here is the Sling Winner, Allen Thomas, with Bill Gravatt, President of Capstone Precision Group. (Bill was formerly the President of Sinclair International).
Bob Sebold, of Team Lapua/Brux/Borden also won the individual F-Class SWN Title. He’s definitely one of the nation’s top F-Open pilots.
There were a dozen or so talented juniors competing at the Berger SW Nationals. Some of the youngsters posted scores that would put the “old guys” to shame. We definitely expect to see some of these young shooters standing on the podium at future Berger SWN events. We asked them to strike a “cool pose” and the Harris boys delivered…
Berger SW Nationals Gallery — Parting Shots
Does this competitor know something we don’t know. Perhaps he is testing a new “Stealth” rifle stock from McMillan. Or maybe this is some kind of Zen body/mind melding practice. We do advocate “dry firing”, but that normally involves holding a real rifle…
Look carefully and you’ll see quite a lot reflected in this SWN competitor’s shooting eyewear. Can you identify the type of rifle?
Michelle Gallagher — She’s probably smiling at an ‘X’ — or maybe she just nailed a tough wind call. The SW Nationals is a great event because of the hard work and dedication of talented folks like Michelle.
Can you name all the pieces of hardware in this image? We see at least a dozen. Don’t forget the little items like the bubble level and mirage shield.
How do you anchor a SEB MINI coaxial rest in under ten seconds? With MAXI feet of course! These over-size hooves belong to shooter Mark Fairbairn, a very tall, MAXI-sized Australian. Who needs to pound those F-Class feet into the ground with a mallet when you can simply “stand and deliver”.
We think some competitors came to Ben Avery just for the great Barbecue lunches — well that plus the great weather and the amazing prize table. Everyone goes home a winner in one way or another.
Texas gunsmith Richard King showed us the biggest rifle action we’ve ever seen. This 13-lb monster is the BAT .50 BMG Action. Honestly it was HUGE — with the bolt fully extended it was the size of your forearm (to the finger tips). Richard joked “This weighs almost as much as an F-TR rifle (before optic) all by itself”.
Today was the final day of the Berger Southwest Nationals (SWN). Two 1000-yard individual matches were scheduled. But the weather gods did not cooperate. Sunday matches were cancelled due to high, gusty winds from the North-Northeast that made it very difficult to handle the large, wood target frames. With concern for the safety of pit workers, match organizers waited until 10:00 am, then canceled the matches. It was a disappointment for some, but all the competitors still enjoyed a great week at Ben Avery.
With the cancellation of Sunday matches, the three individual champions — Sling Division, F-TR, and F-Open have been decided based on the Friday and Saturday results. We congratulate the three new Champions: Bob Sebold (F-Open), Phillip Kelley Jr. (F-TR), and Allen Thomas (Sling).
Top Five Overall – F-Open
Bob Sebold, 843-49X
Keith Glasscock, 843-38X
Jay Christopherson, 841-45X
Stephen Potter, 841-37X
James Crofts, 841-34X
Top Five Overall – F-TR
Phillip Kelley Jr., 838-35X
Ellis Berry, 837-42X
Niklas Montin, 836-35X
Peter Johns, 835-36X
Edward Shelley, 832-33X
Top Five Overall – Sling
Allen Thomas, 844-37X
Oliver Milanovic, 843-45X
Trudie Fay, 842-32X
Nancy Tompkins, 840-43X
Angus McLeod, 840-43X
Team matches concluded yesterday, Saturday. In team competition, Team Lapua/Brux/Borden won the F-Open Division, while Team McMillan finished first in F-TR Division. In the Sling Division, Team USA National Hayes topped the field. Congratulations to the winning teams.
Wicked Winds on Saturday Challenged Competitors
Saturday’s weather was not kind to shooters. Along with cloudy skies came wind — lots of it. The wind was veering, and gusty — with significant changes in velocity. It was hard to predict the cycles — if they could be called that. Erratic was more like it. Many shots were out in the 7 and 8 rings. One champion-level shooter told us: “That was ugly — I got my clock cleaned”. Another shooter said “I ran out of paper to hold off”. At one point, Team Lapua/Brux/Borden (LBB) waited over 30 minutes to take a shot, hoping to get into a steady condition. The patience paid off. Team LBB shooter Jay Christopherson’s final shot (after the long wait) was a 10.
Above is a view from a spotting scope during the 1000-Yard Team Match on Saturday. During the course of the day, there were many 7s and 8s showing on the targets. One competitor said “the wind was so bad, I was holding off the frame”.
Team Lapua/Brux/Berger shot great in tough conditions on Saturday to win the F-Open Team competition. Second from left is Jay Chistopherson, AccurateShooter.com’s System Administrator. When he’s not shooting, Jay works hard to keep our Shooter’s Forum and content sites running smoothly.
The team announced: “Team Lapua-Brux-Borden pulled off a major win today at Berger SW Natinols. Conditions were very challenging but our wind coach was able to keep up with the conditions. Our rifles shot very flat which allowed us to rack up points and Xs. We have a great team and amazing sponsors: Lapua, Brux Barrels, Borden Actions, Cerus Rifleworks. Team members: Jay Christopherson, Eric Cortina, Steve Harp, Tod Hendricks, Pat Scully, and Bob Sebold. Notably, Bob Sebold also won the 2018 Berger SWN Individual F-Open title, making him a double champion.
Eliseo Tubegun with Nightforce Competition scope. These versatile rifle chassis systems are produced by Competition Machine in Cottonwood, Arizona.
Photo by Sherri Jo Gallagher.
There couldn’t be a match without the dedication of the folks who work the pits. At the Berger SWN, competitors did pit duty, ferried by trailers, and there were also some volunteers.
Photo by Sherri Jo Gallagher.
They say behind every successful man is a good woman. Derek Rodgers, current F-TR World Champion, is no exception. His wife Hope Rodgers was on hand throughout the SWN to cheer on her husband.
For many sling shooters, the Berger SWN is the second most important event of the year, right after the NRA Championships, held at Camp Perry (OH) and (now) Camp Atterbury (IN). Check out those patches.
Industry Report — Berger, Lapua and Capstone Precision Group
Last year Berger Bullets was acquired by the Nammo Lapua Group. Berger Bullets, along with Lapua Products, SK Ammo, and Vihtavuori Powder, are now distributed in the USA by the Capstone Precision Group. Berger will continue to offer its full line of bullets, plus Berger-branded Ammunition (formerly ABM Ammo). Likewise Lapua will continue to offer its superb caftridge brass, plus Lapua’s full line of bullets and loaded Ammunition. In this video, Capstone’s Director Bill Gravatt explains how Capstone is working to expand the availability of Lapua and Berger products. In addition, Eric Stecker explains how Berger Bullets can increase production significantly, now that Berger is operating in the large Nammo/Lapua facility in Mesa, Arizona.
Today is the last day of the Berger Southwest Nationals. After the cancellation of Sunday’s 1000-yard matches due to high winds, this year’s 2018 SWN concluded with the Award Presentations. We watched as scores of medals — along with heaps of cash and Berger bullets — were handed out. AccurateShooter.com also awarded prestigious Corinthian awards to Nancy Tompkins (Sling) and Rick Jensen (F-Class).
Photo by Sherri Jo Gallagher.
Team McMillan was the top-performing F-TR squad at the Berger SW Nationals. The team includes many former members of the all-conquering Team Sinclair.
With the Berger Southwest Nationals underway this week, we thought we’d steer our readers to a very useful resource, courtesy Berger Bullets. This online Stability Calculator helps shooters determine the optimal twist rate for their choice of projectiles.
Berger Twist-Rate Stability Calculator
On the Berger Bullets website you’ll find a handy Twist-Rate Stability Calculator that predicts your gyroscopic stability factor (SG) based on mulitiple variables: velocity, bullet length, bullet weight, barrel twist rate, ambient temperature, and altitude. This cool tool tells you if your chosen bullet will really stabilize in your barrel.
How to Use Berger’s Twist Rate Calculator
Using the Twist Rate Calculator is simple. Just enter the bullet DIAMETER (e.g. .264), bullet WEIGHT (in grains), and bullet overall LENGTH (in inches). On its website, Berger conveniently provides this info for all its bullet types. For other brands, we suggest you weigh three examples of your chosen bullet, and also measure the length on three samples. Then use the average weight and length of the three. To calculate bullet stability, simply enter your bullet data (along with observed Muzzle Velocity, outside Temperature, and Altitude) and click “Calculate SG”. Try different twist rate numbers (and recalculate) until you get an SG value of 1.4 (or higher).
Gyroscopic Stability (SG) and Twist Rate
Berger’s Twist Rate Calculator provides a predicted stability value called “SG” (for “Gyroscopic Stability”). This indicates the Gyroscopic Stability applied to the bullet by spin. This number is derived from the basic equation: SG = (rigidity of the spinning mass)/(overturning aerodynamic torque).
If you have an SG under 1.0, your bullet is predicted not to stabilize. If you have between 1.0 and 1.1 SG, your bullet may or may not stabilize. If you have an SG greater than 1.1, your bullet should stabilize under optimal conditions, but stabilization might not be adequate when temperature, altitude, or other variables are less-than-optimal. That’s why Berger normally recommends at least 1.5 SG to get out of the “Marginal Stability” zone.
In his book Applied Ballistics For Long-Range Shooting, Bryan Litz (Berger Ballistician) recommends at least a 1.4 SG rating when selecting a barrel twist for a particular bullet. This gives you a safety margin for shooting under various conditions, such as higher or lower altitudes or temperatures.
Story idea from EdLongrange. We welcome reader submissions.
The most eye-catching display at SHOT Show 2018 was a 3D Hologram animation of the new SAR 9 pistol. Showing the pistol assembling itself in mid-air, the hologram was mesmerizing.
So many products — so little time. We saw some very interesting new products including new Berger Ammunition on our second day at SHOT Show. There were many interesting tools on displays as well as cool new rifles for hunters, varminters, long-range shooters, and tactical marksmen. We also met some old friends on Day Two, including the legend himself — Jerry Miculek.
To give you a feel for SHOT Show, here’s a nice teaser video filmed last year. This shows both Media Day and the events inside the Sands Convention Center. Though this is a year old, we definitely recommend it. Plus is has a LOT of pretty ladies. You won’t be disappointed — honest.
This Video is from 2017, But You Should Definitely Watch It — Lots of Pretty Ladies!
NEW — Berger Branded Ammunition in Lapua Brass
Berger Bullets + Lapua Brass in factory-loaded ammo. You asked for it. Now it’s here. The new line of Berger Ammunition was unveiled at SHOT Show this week at the Capstone Precision Group booth. Berger, Lapua, Vihtavuori, and SK Ammo are now all owned by Nammo Lapua, so we can have these great American-made bullets packaged with superior, European-made Lapua brass*. This is an exciting development. There will be three (3) lines of Berger Ammunition: Match Grade Target, Match Grade Hunting, and Match Grade Tactical. We’ll have a full report with field tests this spring.
NEW and IMPROVED — Lyman Higher Rez Borecam
Better. Sharper. Higher Resolution. The new, upgraded Lyman Borecam® Digital Borescope is a serious candidate for best gunroom tool of the year. We really liked the original Borecam and recommended it highly. But now the new version is a LOT better. Now offering 300k resolution, you can really see finer details inside your bore. Trust us — the difference is VERY Noticeable. We could see very fine detail as never before. We like the fact that the lens wand is marked like a ruler so you can see your insertion depth and the handle has an indexing mark so you can keep track of your rotation. Great product. NOTE: The 300K means the camera delivers 300,000 pixels, i.e. 0.3 megapixel. For a square this is about 550×550. For a standard aspect ratio, this is similar to 640×480 resolution.
NEW — Walther KK500 .22 LR 3P Competition Rifle
Walther unveiled a handsome new smallbore (.22 LR) competition rifle, the KK500. This is more compact, with a shorter length of pull, so it’s a great choice for smaller-framed competitors — women and junior. The new Walther KK500 position rifle features bold red/gray laminated grip and fore-end block, plus an eye-catching red bolt handle. Very nice rimfire rifle for serious 3P smallbore shooters.
NEW — RCBS 6-Station Brass Boss
We tried out the new Brass Boss from RCBS. This new machine features SIX (6) powered tool heads, plus brushes. Four of the tool heads run at variable speeds up to 350 rpm. Two other high-speed tool heads run up to 550 RPM. There is a convenient speed control knob on the side of the unit. This is a great feature — you can run at high RPM for hard jobs like removing military primer crimps, and then slow way down to do more precise tasks such as inside chamfering. We like the Brass Boss. It is a definite upgrade over the previous RCBS Trim-Mate. The new Brass Boss includes tools for all six stations: inside VLD chamfering tool, outside deburring tool, primer pocket cleaners (small/large), military crimp removers (small/large), primer pocket uniformers (small/large), case neck brushes (four diameters), and a tub of dry case neck lubricant. MSRP for the Brass Boss is $189.95. We expect “street price” to be around $155.00.
COOL — World’s Biggest Cutaway Cartridge?
At the Vista Outdoor booth, we saw a 4-foot tall replica rifle cartridge. This was a real eye-catcher. Many folks looking at the giant-sized mock cartridge had never seen a 3-D cutaway like this showing the construction of the primer along with the core and jacket of the bullet. Note to Vista Outdoor — Please send one of these jumbo cutaways for our AccurateShooter.com “Man-Cave”.
WILD — $18,000 Janz Plasma Finish Revolver
Holy Mother of Mercy. This stunning Janz pistol costs $18,000. You can buy an entry-level Honda Civic for that! But does that Honda have a rainbow-colored Plasma finish like the Janz? And can the Civic swap barrel and cylinder assemblies to shoot multiple calibers? These top-of-the line Janz wheelguns are crafted in Germany in very small numbers. Just remember, beauty doesn’t come cheap.
NEW — Leica HD-B 3000 Geovid Rangefinder Binoculars
When we looked through the new HD-B 3000 Leica Geovids we were stunned. Superb clarity and sharpness. And the laser ranging was instantaneous — amazingly fast. The new Geovid HD-B 3000 delivers linear distance determination up to 3,000 yards (2,750 meters). This combo binocular/LRF has an ABC® ballistic brain inside which can output holdover, click adjustment, and equivalent horizontal range (EHR). Barometric pressure, temperature and angle are also included in the measurements. Impressive.
FUN — Selfie Time with Jerry Miculek — The Man, the Legend
Where else but SHOT Show in Las Vegas can you get a selfie with the world’s greatest revolver shooter, the legendary Jerry Miculek. Jerry was signing autographs at the Hornady booth. Of course Jerry’s not just a wheelgun ace. He has been a top 3-Gun competitor and, at last year’s 2017 Industry Day at the Range, Jerry set a world rifle speed record shooting a S&W M&P15.
NEW — Lyman Brass Smith C-Frame Press
Lyman has three new cast-iron presses on display: an O-Frame Single Stage, and 8-station Turret, and this compact Brass Smith C-Frame Ideal open front press. We liked them all but we think this new C-Frame press is an exceptional value. With beefy cast-iron construction, it is much stiffer than other presses in this category. The compound linkage is smooth. The base is big enough to provide good stability. For someone looking for a second press, or a smaller press to take to the range, the new Lyman may be the right solution. Thumbs up.
WEIRD — Virtual Reality Self-Defense Simulator
At the NRA Booth, CarryGuard, the NRA’s insurance program, had a half-dozen high-tech Virtual Reality simulators. Visitors could put on a pair of VR goggles, and then experience a variety of threat scenarios. This helps gun owners recognize true threats and respond in a proper manner. We like the cool Virtual Reality technology, but it still seemed weird to see grown men wearing goofy VR headgear and waving their arms around like circus clowns.
BAD ASS — Victrix Heavy Metal Tactical Rifles
Victrix is an Italian rifle-maker that shows that has proven that the USA doesn’t have a monopoly on seriously “Bad Ass” weaponry. We saw a trio of Victrix Minerva Tactical rifles that look tough enough to survive the Zombie Apocalypse with ease. The Minerva’s beefy carry handle under the fore-end is an interesting feature — something similar might come in handy for big ELR rigs.
SMART — Burris Spotting Scope with Accessory Red Dot
Can you see an extra feature fitted to this Burris Signature HD Spotting Scope. Yep, that’s a Burris Red Dot Sight on the left side near the eyepiece. Smart idea — this helps you align the spotter quickly, particularly in low-light situations. After seeing this rig, we’re wondering how we might attach a red dot to our older spotting scopes. Hats off to Burris for this clever optics upgrade.
NEW and TEMPTING — Tikka T1x Rifle in .17 HMR
When we first revealed the impressive new Tikka T1x rimfire rifle in .22 LR, some readers said: “Well the .22 LR version is nice but will it be available in .17 HMR? That’s what I really want”. Well ladies and gentlemen, Tikka WILL sell a 17 HMR version of the T1x (see above). We saw this on display at SHOT Show and smiled. This gun has a very nice trigger, smooth running bolt, and the magazine is easy to seat (unlike some other recent rimfire rigs). Fitted with a nice 3-18X scope and bipod, this could be a great carry-around varmint rifle. We hope to test one this spring.
* NOTE: With some cartridge types for which Lapua brass is not currently made, other brands of brass may be used. However, most Berger Ammunition will feature Lapua brass.
With all the noise lately about the 6.5 Creedmoor, it’s easy to forget that before we had the Creedmoor, we had another accurate, efficient mid-sized cartridge, the 6.5×47 Lapua. Just as the 6.5 Creedmoor inspired the 6mm Creedmoor, the 6.5×47 Lapua has been successfully necked-down to 6mm (.243) for a 6-6.5×47 variant. This has worked great in a number of roles — benchrest, varminting, and tactical/PRS. This article, from a few seasons back, shows how the 6-6.5×47 Lapua can be successfully packaged as an accurate, potent 6mm varminter.
The 6-6.5×47 Lapua for Precision Long-Range Varminting
Report by Stan Stewart
6mm AI ‘Sellers Remorse’ Spurs New 6mm Project
After selling my 6mm Remington Ackley Improved a couple of years ago and wishing I had not, I thought about a new customer rifle for work on Prairie Dog towns and New York wood chucks at 600+ yards. I have a .223 AR and 22-250 for medium ranges but I missed my 6mm AI for long-range work. The 22-250 is a fine chambering, but it is hard on barrels, and I think the 6mms may have an accuracy edge out past 400 yards. Also, shooters today enjoy a vast collection of really great 6mm bullets. Barrel life and bullet ooptions were two main reasons I decided to build a 6mm rather that another .224-caliber gun. But the question remained — what 6mm chambering to choose? Although I missed my 6mm AI, I did not miss fire-forming the brass, so when I learned about the 6-6.5×47 Lapua, a wildcat case easily formed by necking down the parent 6.5×47 case, I thought this might be the answer.
I started doing serious research on the 6-6.5×47 Lapua. I received a lot of good advice from AccurateShooter.com and other websites on the pros and cons of the new cartridge. Most reports were positive. I also talked to gunsmiths — quite a few recommended the new cartridge as well. Some of the cartridge attributes I liked were the small rifle primer, enough case capacity to efficiently reach 3700 fps with a 70gr bullet and 3400 fps with an 85-grain, without being terribly over-bore.
Most important was the 6-6.5×47’s reputation for inherent accuracy without being finicky like my 6mm AI (my experience). So, having chosen my cartridge, I started asking for gunsmith recommendations. Again the folks on the AccurateShooter Forum were very helpful. After many conversations I settled on Dave Bruno in Dayton, Pennsylvania. He was a good choice. After working with Dave on this project, I could not be happier. He was very helpful considering this was my first complete custom gun.
Putting Together the New Rig with Premium Components
From the get-go, I knew I wanted a BAT action and Krieger barrel. BAT Machine and Krieger Barrels enjoy a great reputation in the shooting industry. BATs are beautifully machined, smooth, and strong. Krieger cut-rifled barrels are known for dependable accuracy and long barrel life. While many 6-6.5×47 shooters choose a 8-twist barrel to shoot the 100-108gr bullets, I would be using smaller, varmint-weight bullets, so I selected a 1:10″-twist Krieger. This would allow me to shoot bullets from 60 grains up to 90 grains. Dave chambered the barrel with an 0.269″ neck and fluted the barrel to save weight. I also had Dave install a Vais muzzle brake. The Vais brake is more expensive than some others, but it is a proven product. Dave fitted the BAT with a 2 oz. Jewell trigger, mounted with a +20 MOA scope rail, then pillar-bedded the BAT into a McMillan Hunter-Class-style fiberglass stock. The scope is a 12-42x56mm Nightforce NSX, mounted in a set of Nightforce rings I hand-lapped for better contact.
Load Development for Varminting
I had selected a few powders and bullets recommended by other 6-6.5×47 shooters and started by seating all the bullets .005″ off the lands. The powders I selected were Varget, Vihtavuori N550, and Reloder 15.
I was very pleased with the 88gr Bergers. In initial testing, they grouped well and I was able to drive them to 3400 fps easily. As I wanted a gun for long-range varmint work, I was hoping the 10-twist barrel would provide enough stability for the heavier weight bullets. It did — the 10-twist worked great! I was able to shoot the lighter weight bullets very well and the 88s were superb. With a BC of 0.391, leaving the barrel at 3400 fps, these bullets were still traveling at 2600 fps at 600 yards!
I did wonder how well the 88s would work on varmints given their small meplats (and limited expansion). A call to Berger reassured me the 88s should work fine on small varmints. The test came last summer when I made a trip to NY and got to visit my old Chuck hunting farms with my new rifle and old hunting buddy. The longest shot we had was only 300 yards, but the Berger 88s did great. None of the eight critters we nailed so much as wiggled after they were hit.
I did a lot of testing, recording group sizes for a variety of different bullets and powders. With all the data collected in a spreadsheet, I was able to “crunch the numbers”, and that helped me choose my preferred loads. By looking at the average group size for the individual bullets and powders, the data drew a clear picture of what the rifle shot best. Below is a chart showing comparative group sizes, arranged by both bullet type and powder brand.
Got Bullets? Right now Midsouth Shooters Supply is running a big sale on Berger Bullets, including many Hybrid and VLD match projectiles in all the popular calibers. You can save $3-$5 on a 100-count box. CLICK HERE for BERGER BULLETS SALE.
Here are some of the best deals we found on some of the most popular Berger Bullets, caliber by caliber. Berger’s 7mm 180gr Hybrid is the bullet-to-beat in F-Open competition, and the new 200.20X is favored by many top F-TR shooters, including members of the world-championship-winning F-TR Team USA. The Berger 6mm 105gr Hybrid Target has long been a favorite of Benchrest, High Power, and PRS shooters, as loaded up in match rifles chambered for 6mmBR, 6mm Dasher, 6XC, or 6mm Creedmoor.
.20 Caliber 35gr Match Varmint HP, $24.43 marked down from $27.18 .22 Caliber 80gr Match Target VLD, $29.13 marked down from $32.40 .243 Caliber (6mm) 105gr Match Hybrid Target, $34.46 marked down from $38.32 .264 Caliber (6.5mm) 130gr Match Target VLD, $42.44 marked down from $47.21 .284 Caliber (7mm) 180gr Match Hybrid Target, $47.61 marked down from $52.96 .30 Caliber 200gr 200.20X Match Hybrid Target, $49.65 marked down from $55.22
Hybrid Bullet Design — Best of Both Worlds?
Note: On the 
6mm AI ‘Sellers Remorse’ Spurs New 6mm Project
Load Development for Varminting
