Tactical competitor Zak Smith stores his elevation and wind drift data on a handy laminated data card. To make one, first generate a come-up table, using one of the free online ballistics programs such as JBM Ballistics. You can also put the info in an Excel spreadsheet or MS Word table and print it out.
Above is a sample of a data card. For each distance, the card includes drop in inches, drop in MOA, drop in Mils. It also shows drift for a 10-mph cross wind, expressed in inches, MOA, and mils. Zak explained that “to save space… I printed data every 50 yards. For an actual data-card, I recommend printing data every 20 or 25 yards.” But Zak also advised that you’ll want to customize the card format to keep things simple: “The sample card has multiple sets of data to be more universal. But if you make your own data card, you can reduce the chance of a mistake by keeping it simple.”
Once you have the card you can fold it in half and then have it laminated at a local office store or Kinko’s. Keep this in your pocket, tape it to your stock, or tie the laminated card to your rifle. If you regularly shoot at both low and high elevations, you may want to create multiple cards (since your ballistics change with altitude). To learn more about ballistic tables and data cards, check out the excellent “Practical Long-Range Rifle Shooting–Part 1″ article on Zak’s website.
Scope-Cover Mounted Ballistics Table
Another option is to place your ballistics card on the back of the front flip-up scope cover. This set-up is used by Forum member Greg C. (aka “Rem40X”).
With your ‘come-up’ table on the flip-up cover you can check your windage and elevation drops easily without having to move out of shooting position.
Greg tells us: “Placing my trajectory table on the front scope cover has worked well for me for a couple of years and thought I’d share. It’s in plain view and not under my armpit. And the table is far enough away that my aging eyes can read it easily. To apply, just use clear tape on the front objective cover.”
Rifle accuracy is pointless unless you can see your target and aim precisely. That’s why good optics are so important for precision shooting — from 50 yards out to a mile and beyond. Top quality scopes can be very expensive — you’ll see optics costing $3000 or more on many competition F-Class and PRS rifles. Today’s video showcase covers important “Riflescope Knowledge”, including how to adjust for parallax, and how to properly sight-in your scoped rifle. In addition there’s a helpful video defining Minute of Angle (MOA) plus videos showing how to mount optics correctly (and avoid common scope-mounting mistakes).
Rifle Sight-In Process — Start to Finish
Here Ryan Cleckner shares his process for sighting in a scoped rifle. This helpful video covers the full process: bore-sighting, 25-yard shot confirmation, shooting groups, making adjustments at 100 yards, and finding mechanical zero. Looking for more valuable rifle instruction? Then check out Ryan Cleckner’s book, Long Range Shooting Handbook.
How to Adjust for Parallax
Most precision rifle scopes have parallax adjustment, but what is it and why do you need to adjust it? In this Shooting USA video, John Paul of JP Rifles defines parallax and explains why you need to set parallax correctly for the distance to your target. The video then show how to adjust parallax correctly, a process which should start with the scope’s ocular focus.
Understanding Minute of Angle (MOA)
In this video, Ryan Cleckner explains the measurement term “minute of angle” (MOA) and how to use MOA adjustments on your scope to compensate for bullet drop at varying distances. MOA is an angular measurement, used often in long range shooting, that is 1/60th of one degree of a circle. One MOA represents 1.047″ at 100 yards and 10.47″ at 1000 yards. Want to learn more? Read Ryan Cleckner’s article Understand and Using Minute of Angle.
Scope Mounting: Common Scope-Mounting Mistakes To Avoid
Mounting a scope isn’t a super-complex or highly technical job, but there are ways you can mess it up. This Brownells video explains common pitfalls to avoid when you’re mounting a rifle scope.
1. Make sure the rings don’t touch any part of the turret housing, objective bell, or eyepiece. Any one or combination of those will throw off your shot groups big time. Make sure those rings are clamping ONLY the scope’s main tube.
2. Ensure that the scope rings are properly clamped to the scope base. If you can grasp the scope with one hand and the rifle with the other and there’s play between them, your groups are going to be all over the place! Scope rings come with torque specs for a reason.
3. Make sure there’s clearance between the objective bell and the rifle. No part of the scope should touch the rifle itself. The only nexus between the scope and the rifle should be the scope rings — and they’re not actually part of the rifle. This also applies to a removable lens cover. When it’s on the scope, it should not touch any part of the gun.
4. Don’t mount the scope too low on an AR-15. On most rifles, you do want the centerline of the optic as close to the bore as you can get it. But the AR-15’s stock is on almost the same plane as the top of the receiver, so you need some height on the scope. Otherwise, it’ll be too low for you to look through it.
5. Overtightening the scope rings is VERY BAD. You can actually crush the scope tube and damage the optic beyond repair. Stick to those torque specs! If the rings come with a little wrench, that wrench is all you need to tighten them.
How to Sight In a Riflescope — Vortex Tech Talk
This popular video from Vortex Optics explains how to sight-in a rifle so that the reticle is aligned correctly and the scope is zeroed properly for your intended application/discipline. People need to remember that the sight height established by the rings will affect their zero, as the centerline of the scope is above the centerline of the barrel.
Scope Mounting — Proper Alignment and Torque Values
An improperly installed scope can cost you points at a match. In this video, MDT Pro Shooter Keith Baker explains the simple steps required to ensure your scope is secured properly with the reticle aligned correctly. The video centers on a typical Precision Rifle optics installation, but the techniques will also work for hunting, varmint, and benchrest rifles.
Do you own a Springfield M1A (or wish you did)? Then you should watch this 5-minute video from the American Gunsmithing Institute (AGI). This video shows the basics of the operation of the popular M1A rifle, the civilian version of the military M14. In this video, gunsmith John Bush field-strips the M1A and shows how the bolt, op rod, and trigger group fits together and operates. This video contains excerpts from the M1A Rifle Armorer’s Course, AGI Course #1584. The full Armorer’s Course is available on DVD from www.AmericanGunsmith.com.
Watch Highlights of AGI M1A Rifle Armorer’s Course:
2023 CMP Springfield M1A Match at Camp Perry
The 16th annual Springfield Armory M1A Match will take place during the 2023 CMP National Rifle Games Matches. The CMP will host the event on Sunday, July 30, 2023, the same weekend as the Garand/Springfield/Vintage Military matches. Competitors of all experience levels are encouraged to bring their M1A rifles to Camp Perry and compete. CLICK HERE for Online REGISTRATION. The match is open to all individuals ages 12 and above. For more information contact the CMP at competitions@thecmp.org or call 419-635-2141 ext. 724 or 714.
The Springfield Armory M1A match began with one man’s idea and passion. Springfield Armory’s Mike Doy witnessed the waning of classic M1 Garand and M1A rifles from the competitive High Power firing lines. “I really wanted to get those M1A rifles out of safes and closets and back out onto the field. So 11 years ago, I promoted the idea of running an M1A-specific match at Camp Perry. That first year we had over 600 competitors and spectators.” Now the match offers some of the biggest pay-outs at Camp Perry. In recent years, Springfield Armory has donated over $25,000 worth of cash and prizes, including a $2,000 cash award to the overall winner.
Article by Paul Ivnitskiy and David Lewis of AmmunitionToGo.com
As you know, if your magazine spring loses its elasticity or breaks, it can render your firearm almost worthless. AmmunitionToGo.com conducted a test to determine how long mag springs can last. The test also examined whether leaving a mag loaded for an extended period of time causes problems, or if loading a mag can damage its spring. The test findings are eye-opening and show that, under controlled conditions, the springs themselves will last more than a human lifetime for most shooters.
The test crew subjected 13 different mags (from multiple manufacturers) to a test protocol over a year. The protocol included loading and unloading to full and half capacity, storing in climate-controlled and fluctuating temperatures, and storing in a non-climate controlled shed.
Field Testing — Magazines Performed Flawlessly
The crew took the mags to the range for field testing throughout the test study. The results revealed that regardless of the frequency of loading or unloading, or storage conditions, not a single magazine failed. The use of a digital force gauge showed no significant variability in the springs’ resistance from mag to mag but all the tested springs put up 20-25% less resistance than when they were fresh out of their factory packaging. That said, all of the mags performed flawlessly during field testing.
Laboratory Magazine Testing — Tens of Thousands of Cycles
To determine precisely how much punishment a mag can tolerate before its spring starts wearing out, the team recruited help from lab technicians at Applied Technical Services. The results showed that a factory Glock 17 mag spring endured 14,842 cycles (the equivalent of 252,314 rounds) before it snapped, while the Magpul Gen 3 PMAG endured 69,881 cycles (2,096,430 rounds) before it finally gave up.
While this testing was not perfectly emulated under real-world conditions, it is safe to conclude that mag springs are remarkably durable. Many believe that by downloading a mag, that is, loading the mag shy of full capacity, they can protect their mag springs. However, the real world trials don’t offer up any evidence to support this kind of behavior by shooters.
Conclusion — Get Good Mags and Don’t Worry About Them
Common wear and tear from everyday use is more likely to degrade the overall quality of a firearm magazine than the spring failing on its own from being loaded to full capacity and stored for long periods of time. So, unless you’re part of the group of individuals that actually shoots thousands of rounds down range on a weekly basis for training or completion reasons, the whole issue of worrying about the lifespan of your magazine springs is somewhat trivial.
Other Important Factors to Consider
There are many other factors to consider before worrying about magazine spring failure. First, address the overall quality and cleanliness of your firearm, magazine housing, guide rod, buffer tube spring, ammunition choice, the list goes on. Magazine springs are relatively cheap items that can ultimately fail, just like any other man-made item before it. Luckily, magazine springs are very easy to replace once identified as the cause of a malfunction.
Readers who have just recently discovered the Daily Bulletin may not realize that AccurateShooter.com has hundreds of reference articles in our archives. These authoritative articles are divided into multiple categories, so you can easily view stories by topic (such as competition, tactical, rimfire, optics, shooting skills etc.). One of the most popular categories is our Technical Articles Collection. On a handy index page (with thumbnails for every story), you’ll find over 100 articles covering technical and gunsmithing topics. These articles can help you with major projects (such as stock painting), and they can also help you build more accurate ammo. Here are five popular selections from our Technical Articles archive.
Stress-Free Pillar Bedding. Richard Franklin explains how to do a top-quality bedding job, start to finish.
OnTarget Software Review. Our Editors test free software that measures shot groups with great precision. We explain how to use the program and configure advanced features.
Savage Action Tuning. Top F-TR shooter Stan Pate explains how to enhance the performance of your Savage rifle by optimizing the torque settings of the action screws.
Complete Precision Case Prep. Jake Gottfredson covers the complete case prep process, including brass weight sorting, case trimming, primer pocket uniforming, neck-sizing, and, case-neck turning.
Stock Painting Instructions. Step-by-step guide for stock painting by expert Mike Ricklefs. Mike shows both simple coverage and fancy effects.
PMA Tool offers lightweight yet sturdy cleaning cradles that are handy, affordable, and easy to transport. PMA’s popular single-gun cradle, priced at $99.95, is ideal for benchrest and F-Class rigs. It measures about 17″ in length and weighs about one pound. You can choose among 2.25″, 3″, 4″, 5″, and 6″-wide saddles (U-shaped padded supports) to match your forearm width.
PMA also offers an excellent double cradles for $149.95. These twin cradles have 2.5″, 3″, or 4″ saddles, or a combo of 3″ / 2.25″ front saddles. All these cradle types secure your rifle(s) in a muzzle-down position that allows easy cleaning and prevents solvents from running back into the action. The front saddles and all contact surfaces are covered by thick silicone rubber padding which grips the rifle securely yet protects the stock and components from scratches.
These cradles are most commonly sold with a 3″-wide front saddle for Benchrest and F-Open style stocks, or a 2.25″-wide front saddle for rifles with narrower fore-ends such as those found on F-TR, Hunter Class, and varmint stocks. In addition, you can get 4″-wide, 5″-wide, and even 6″-wide saddles for the big, long range benchrest rifles.
Double Rifle Cradle is a Smart, Versatile Design
PMA’s double rifle cleaning cradle was was designed from the ground up to work perfectly for two rifles side-by-side. Using the same tie bar and protective saddles found on the single cradel, PMA widened the base and created new uprights to support the saddles, making the cradle as narrow and light as possible, while retaining all the protective and non-slip features from our single unit.
This PMA Tool double cradle unit is available with twin 3″ front saddles, double 2.5″ front saddles or combination 3″ / 2.25″ front saddle configurations to accommodate different classes of benchrest rifles.
We like well-executed DIY (Do-It-Yourself) projects. You can save money with DIY projects, and often create something unique and special that can’t be purchased from any vendor. That’s the case with this very cool double shooting bench built by Jacob D., a pilot and 6.5 Creedmoor shooter. The design of the bench is smart — it allows two right-handed shooters, but it can also handle a right-hander and a left-hander. (The lefty sets up in the right half of the bench.)
Jacob, who flies for Arizona’s Mesa Airlines, built his own side-by-side benchrest shooting bench. He then posted photos of this on the 6.5 Creedmoor Group Facebook Page. We like this — very nice work Jacob!
Jacob writes: “Sighting in my new Ruger Precision Rifle with Leupold VX3i LRP 6.5-20x50mm and Burris tactical rings, using my benchrest table I built. Very happy with the combo!”
There is plenty of room for two shooters and two rifles on Jacob’s big and sturdy DIY shooting bench.
Proper eye protection is ‘must-have’ gear for shooting sports. In addition to providing reliable impact protection, good shooting glasses should be comfortable, fog-free, and not interfere with your preferred hearing protection. Those who require corrective lenses also need to consider the various options available. In a past episode of their Weekly Gear Review, the 6.5 Guys discuss a variety of shooting glasses they have tried, including examples from DeCot, Oakley, and Wiley-X. Ed and Steve outline the key considerations when choosing eye protection, and then review practical aspects of eyewear design and construction that enhance comfort and functionality in the field.
The 6.5 Guys (Ed and Steve) offer a number of smart tips consider safety eyewear, helping you select the most effective safety glasses at an affordable price. Here are the 6.5 Guys’ KEY Take-aways when choosing shooting glasses, including prescription eyewear:
Key Things To Consider When Choosing Eye Protection
1. Avoid polarized lenses or lenses that reduce light transmission significantly (except for action shooting in very bright conditions with large, close targets).
2. Avoid frame designs that interfere with prone shooting.
3. Avoid designs that easily fog.
4. Avoid frame designs with thicker temples that are uncomfortable to wear underneath hearing protection.
5. Select lenses with an appropriate degree of ballistic protection. CLICK HERE to learn more about eyewear safety standards.
6. When you get your prescription, be sure your ophthalmologist includes the interpupillary distance. This is a critical measurement particularly for heavier prescriptions.
7. If you have a complicated prescription select a vendor who will actually spend time with you to address any concerns.
Horrific .50 BMG Kaboom — Eye Saved by Protective Eyewear
Think you don’t need eye protection? Watch this video starting at 4:10. The screw-on barrel “cap” (chamber closure) of the .50 BMG action flies into the shooter’s face. Without eye protection the shooter would have definitely lost his right eye. (See video at 5:20 for analysis).
Safety First — Your Eyes Are Irreplaceable Accurate shooting begins and ends with the human eye. Your career as a marksman could be cut short if you don’t use good eye protection every time you go to the range and/or handle a firearm.
Every year, over 1,000,000 people suffer serious eye injuries. Shooting is hazardous; it is estimated that there are 30,000 firearms-related eye injuries each year (if you include paintball sports.) After paintball, general hunting accidents comprise most firearms-related eye injuries.
Quality eye protection need not be expensive. You can find comfortable, ANSI Z87.1-certified shooting glasses for under $10.00.
If you select shooting glasses carefully, and ensure that your eyewear is safety-certified, inexpensive shooting glasses can perform very well. But you need to avoid cheap, soft-plastic lenses that claim “impact resistance” without satisfying a testing standard.
Do you own an RCBS electronic powder dispenser? If you do, take the time to watch this ChargeMaster Tuning video from 8541 Tactical. This nine-minute video demonstrates how to re-program your ChargeMaster to “tune” the dispensing process. The video shows the exact programming procedures to follow, step-by-step. Some folks want a faster powder flow — others tune their machines for a more reliable drop (with fewer over-runs). One cheap and popular modification is to insert a 1″-long section of a McDonald’s plastic straw in the ChargeMaster’s silver dispensing tube. This works surprisingly well to smooth kernel drop and prevent “clumping” that can cause an over-charge. The McDonald’s straw MOD is demonstrated in this video, starting at the 6:22 mark.
Large-Diameter Dispensing Tube Mod
Many folks have had success with the McDonald’s straw modification demonstrated in the above video. However, some folks would like to get even better flow performance (with virtually no clumping). Forum Member Frank B. has come up with a new option using a brass hose fitting with a large outside diameter. The hose fitting (with tape wrapped around the barbed nose section) is placed inside the RCBS dispensing tube (have some kind of wrap — you don’t want metal-on-metal). Here’s how the unit looks installed:
Frank tells us: “I have found a cure for the over-throw problem. It is a simple 1/4″ barbed hose nipple. I wrapped a couple layers of tape around the barbed end for a snug fit. With this in place, I have thrown 100+ charges of Varget without a single overthrow. The ID of the barbed end needs to be approximately 3/16″ to feed a steady flow. This works because of the larger ID at the drop.”
Frank adds: “You can see in the photo that the powder is not stacking up. You can watch it drop one grain at a time. Hope this will take the aggravation out of your case charging.” For best performance with this brass fitting MOD, we recommend de-burring and smoothing out the front edge of the brass fitting over which the kernels drop.
Brass fitting mod suggested by Boyd Allen. We welcome reader submissions.
Rifleshooter.com does some great original research — providing “hard data” you can’t find anywhere else. Here are the eye-opening results of Rifleshooter.com’s 6.5 Creedmoor barrel cut-down test. You may be surprised at the results. Read on…
What do you get when you cut a 6.5 Creedmoor-chambered barrel down to just over 16 inches? A lot more velocity than you might think. Our friends at Rifleshooter.com conducted a remarkable barrel cut-down test with 6.5 Creedmoor test rifle, shortening the barrel from 27 to 16.1 inches in one-inch increments. Surprisingly, with a 142gr Sierra MK, the total velocity loss (as measured with a Magnetospeed) was just 158 FPS, an average of 14.4 FPS per inch of barrel length. With the lighter 120gr A-Max bullet, the total velocity loss was 233 FPS, or 21.8 FPS average loss per inch of barrel.
Test Procedure
Five (5) rounds of each type of cartridge were fired at each barrel length and the velocity data was recorded with a MagnetoSpeed V3 barrel-mounted chronograph. The rifle was then cleared and the barrel was cut back one inch at a time from 27″ to just over 16″. NOTE: During this winter test, the air temperature was a very chilly 23° F. One would expect higher velocities across the board had the outside temperature been higher.
The photo below shows how the barrel was cut down, inch-by-inch, using a rotary saw. The barrel was pre-scored at inch intervals. As the main purpose of the test was to measure velocity (not accuracy) the testers did not attempt to create perfect crowns.
6.5 Creedmoor vs. Other Mid-Sized 6.5mm Cartridges
The 6.5 Creedmoor is a very popular cartridge with the tactical and PRS crowd. This mid-size cartridge offers good ballistics, with less recoil than a .308 Winchester. There’s an excellent selection of 6.5mm bullets, and many good powder choices for this cartridge. When compared to the very accurate 6.5×47 Lapua cartridge, the 6.5 Creedmoor offers similar performance with less expensive brass. For a tactical shooter who must sometimes leave brass on the ground, brass cost is a factor to consider. Here’s a selection of various 6.5mm mid-sized cartridges. Left to right are: 6.5 Grendel, 6.5×47 Lapua, 6.5 Creedmoor with 120gr A-Max, 6.5 Creedmoor with 142gr Sierra MK, and .260 Remington.
When asked to compare the 6.5 Creedmoor to the 6.5×47 Lapua, Rifleshooter.com’s editor stated: “If you don’t hand load, or are new to precision rifle shooting, get a 6.5 Creedmoor. If you shoot a lot, reload, have more disposable income, and like more esoteric cartridges, get a 6.5×47 Lapua. I am a big fan of the 6.5×47 Lapua. In my personal experience, the 6.5×47 Lapua seems to be slightly more accurate than the 6.5 Creedmoor. I attribute this to the quality of Lapua brass.” Now that Lapua offers 6.5 Creedmoor brass with small primer pockets, the 6.5 Creedmoor is even more attractive.
The creator of Rifleshooter.com also operates a Custom Rifle Building enterprise and gun shop in Long Island, New York: 782 Custom Guns Ltd.. He tells us: “We offer an unparalleled level of gunsmith machine shop services in the Long Island region. From precision rifles (USMC M40A3/A5/A6 XM3 clones) to customized Remington 870 and Mossberg 590 shotguns, and customized 1911s, chances are if you can dream it, we can build it!”
Scope-Cover Mounted Ballistics Table
Accurate shooting begins and ends with the human eye. Your career as a marksman could be cut short if you don’t use good eye protection every time you go to the range and/or handle a firearm.
