This story first ran in 2010. But to mark our long-standing friendships with shooter Joe Friedrich and chassis builder Gary Eliseo, we wanted to reprise the article for the new year, with 2024 just hours away. Joe’s Eliseo-chassis 6mmBR rifle delivered some of the most amazing accuracy with factory ammo we’ve ever seen, in any rifle, in any caliber.
Amazing Accuracy from 6mmBR Tubegun
What kind of accuracy do you think a tubegun can deliver with factory ammo — during barrel break-in? Perhaps 0.6″ at 100 yards, half-MOA if the conditions are perfect? Well you may want to change your preconceptions about tubeguns — and factory ammo. This Eliseo R5 repeater, smithed by John Pierce with a Pierce CM action and Broughton 5C barrel, shot the Lapua 90gr factory ammo into flat ONEs during the break-in session. A day later, in tricky 8-14 mph winds, the gun nailed a witnessed and software-measured 0.174″ 5-shot group using the 105gr factory ammo. That would be impressive for a “full-race” benchgun with precision handloads. For an across-the-course rifle shooting factory ammo, it’s pretty amazing.
Eliseo Tubegun Shoots in the Ones
This accurate rifle belongs to our friend (and designated expert trigger-puller) Joe Friedrich. During the initial break-in session, since his reloading dies had not yet arrived, Joe decided to start with some Lapua factory-loaded 6BR ammo he had on hand. After doing a few two-shot-and-clean cycles (with patches and nylon brush), Joe decided to try a 3-round group just to see if the Broughton barrel had some potential. To his astonishment, the Eliseo R5 put three rounds in 0.100″ (photo below left). Joe then cleaned the barrel again, shot a couple foulers and tried a 4-shot group. The results were just as stunning — 4 shots in a mere 0.104″ but three in virtually one hole (photo below right).
You Can’t Believe How This Gun Shoots
Joe called your Editor and said “You can’t believe how this gun shoots with factory ammo!”. So we arranged a photo session for the next afternoon, where I could verify the rifle’s accuracy. Well it turned out the conditions were way more challenging than when Joe broke in the barrel the day before. Winds were running 8-14 mph and were swinging through 180 degrees half-way down the range. Joe fired a few 90s through the Oehler chronograph at my request, then opened a box of Lapua 105gr factory ammo. It took about four rounds for the barrel to settle in after being cleaned the night before. Then Joe got serious, and with your Editor looking over his shoulder, he drilled a 0.174″ five-shot group in switching winds, doping every shot. Joe felt the gun could have shot tighter but he missed one wind call.
Serious Accuracy with a Multi-Purpose Rifle
So there you have it — a tubegun that shoots in the ones with factory ammo. Joe says that, at least with the 90s, the Elesio R5 shoots as well as his 6 PPC. Joe stressed that “steering the tubegun is hard work. You really have to concentrate compared to a purpose-built bench gun like my PPC. With the tubegun, everything has to be perfect on every shot — hand position, cheek position, stock position in the bag. If you’re off just a little bit, it’s easy to steer the gun the wrong way and send a shot out of the group.”
Accuracy Great But Fouling Heavy and ES Could Be Better
Have there been any negatives to Joe’s 6BR tubegun experiment so far? Well, the Broughton 5C barrel, while phenomenally accurate, shows signs of being a bad fouler. Copper built up pretty quickly over the first 25 rounds or so. We saw best accuracy with a recently-cleaned barrel. Hopefully the fouling will lessen as the barrel polishes in with use. And the canted land barrel is slower than average with the factory ammo. Lapua rates its 90gr naked-bullet ammo at 2950 fps with a 26″ tube. In Joe’s 27.5″ barrel we only averaged 2901 fps. With the 105gr factory ammo, which is rated at 2790 fps, we averaged just 2694 fps. That’s quite disappointing. Also the ES on the factory ammo, slightly over 50 fps for both bullet types, wasn’t particularly good. Still, the overall results were stunning. This gun shoots better than many long-range benchrest rifles running carefully-developed handloads — and it does that with factory ammo, right out of the box.
Joe Friedrich is a superb benchrest shooter, who has won many matches and set National Records in ARA rimfire benchrest competition. Here is Joe with “Sweet Pea”, his favorite .22 LR rimfire rig. With over 100,000 rounds through the Benchmark barrel, this well-worn rifle set an ARA 4-target Aggregate record! READ about Sweat Pea Record HERE.
Share the post "Sunday GunDay: Joe’s Ultra-Accurate 6mmBR Eliseo Tubegun"
As we release this story, the New Year — 2024 — is just 15 hours away (East Coast Time). Perhaps you’ve been eagerly awaiting for the big event, getting champagne (and sparklers) to celebrate the New Year. Hopefully, 2024 will be much better than 2023, a tough year with inflation, the border crisis, conflict in the Mid-East, ongoing war in Ukraine, and shocking incompetence/corruption in Washington. To mark the dawning of 2024, with hope for a much better year, we expect many folks will open a bottle of champagne. You could pop the cork the traditional way, or read on and learn how to release the celebratory champagne with a rifle shot, as demonstrated by the talented Kirsten Joy Weiss. Click on the above video to see Kirsten release champagne with a rimfire rifle.
Recently at Thorton Winery in Temecula, California, a champagne vintner, we were shown the best way to open a champagne bottle. We were told you should hold the bottle nose up at an angle then rotate the BOTTLE slowly while holding the cork. That works great… but it’s not as stunning as the way sharpshooter Kirsten Joy Weiss opens a bottle of bubbly.
A former competitive smallbore rifle shooter, ace trigger-puller Kirsten Joy Weiss tried a special New Year’s trick shot a few seasons back. In keeping with the festive New Year’s spirit, Kirsten attempted to shoot the cork off a champagne bottle. After a few unsuccessful tries, she managed to hit the cork with at least two shots. But alas the cork did not fly. She actually hit the cork, but it did not release. That was surprising…
Undaunted, Kirsten changed her strategy, aiming for the neck of the bottle. This duplicates the process of “sabering” a champagne bottle — a method of liberating the bubbly by slashing off the end of the neck with a blade. Aiming for the neck of the bottle, Kirsten successfully blew off the top of the bottle. (Apparently, when “sabering” it is actually the pressure within the champagne bottle which does most of the work).
Share the post "For New Year’s Eve — Kirsten’s Champagne Bottle Trick Shot"
For many years, the U.S. Army Marksmanship Unit (USAMU) regularly published reloading “how-to” articles on the USAMU Facebook page. In this article, the USAMU’s reloading gurus address a question frequently asked by prospective handloaders: “Should I buy a single-stage press, or a progressive?” The USAMU says the best answer is Solomon-esque in both its wisdom and simplicity: “Get BOTH!” However, there is definitely more to the issue, as the USAMU explains below.
Progressive Press Safety Considerations
by USAMU Staff
Many are the beginning handloaders who have asked a friend about their “setting up” a progressive press for them. The idea is that the newbie could then just feed in components and crank out buckets of practice ammo without needing to really learn much about handloading. Tempting though this might be, that’s simply not how it works. Such an approach might be ok if there were never a malfunction with either press or operator, but that’s unrealistic. Our hypothetical newbie would then lack the knowledge to problem-solve most situations.
Worse yet, several different handloading operations would be occurring at different stations on the progressive press at the same time. It takes an experienced operator to keep track of, and truly understand the significance of, all those potential mini-problems. Loading without this experience is a recipe for potential disaster – such as a double powder charge (especially with pistol cartridges) dropped while the loader was attending to some other function, etc. Progressives are an animal unto themselves, and while they offer many benefits, they do take some getting used to – even by experienced handloaders!
ILLUSTRATIVE HORROR STORY
Here, enter a 40-year veteran handloader who decided to jump onto the progressive bandwagon late in his career, having used only single-stage presses all his life. A High Master NRA High Power Rifle competitor, he had no background in competitive pistol shooting, where historically most progressive presses are found.
Experienced Action Pistol shooters have typically encountered multiple episodes in which shooters “skipped” a powder charge for some reason, leading to a squib round and a bullet possibly lodged in the bore. Thus, at matches, it’s reflexive for them to yell “STOP!” in unison if they see a shooter get a “click” vs. a “bang”, and rack the slide to keep firing. This writer has personally seen several pistols saved in just such scenarios over the years.
Click No Bang — What NOT to Do
Our High Master set up a popular progressive press and began turning out .223 Rem 100-yard practice ammo with abandon. He was using a moly-coated 52gr match bullet and an economical, fast-burning surplus powder that gave great accuracy. Once on the range, he began practicing strings of rapid-fire. All was well, until he heard “Click!” rather than “Boom”.
Lacking the above experience or onlookers to halt him, he reflexively operated the charging handle on his expensive, custom NM AR15 Service Rifle, and the next trigger squeeze reportedly registered on seismographs over at least a three-state radius. He sat, uninjured but bewildered, until the hail of expensive bits and pieces quit raining down around him.
When the smoke cleared, he immediately cursed the horrid, evil, demonically-possessed progressive press for this, his first-ever reloading mishap. His $1400 NM upper was ruined, but thankfully, his $800 pre-ban lower… and he had escaped injury.
This tale is told not to discourage the use of progressive presses, but to emphasize the need to EASILY and IMMEDIATELY KNOW what is happening with the press at each station, every time the handle is cranked. Not to do so is, as they say, “bad ju-ju.”
It illustrates why we at the USAMU Handloading Shop agree in recommending that new handloaders should begin with a single-stage press. Once one thoroughly learns the steps in each phase of handloading by repeated experience, then one will be qualified to move on to a progressive press.
The single-stage press will REMAIN virtually indispensable for one’s entire handloading career, even after having purchased a progressive press (or two). There are endless small projects that are best handled on a single-stage press, and a poll of USAMU’s Handloading staff reveals that not one would willingly be without his single-stage press, despite owning at least one progressive.
Share the post "Safety Considerations When Using Progressive Presses — USAMU"
NRA Media offers a series of informative videos about the Science of Shooting, covering a wide range of topics, from eye dominance to long-range ballistics. These videos feature high production values, with super-slow motion segments, as well as helpful computer graphics to illustrate the principles covered.
The videos are narrated by Jessie Harrison, a top action pistol shooter (and the first women ever to achieve USPSA Grand Master status). Jessie is assisted by talented shooters such as Top Shot Season 4 Champion Chris Cheng. There are 40 videos in the Firearm Science Video Series. Here are seven good NRA science videos, with links to others below.
Olympic Gold Medalist Jamie Gray demonstrates the four positions used by competition shooters: Prone, Standing, Sitting, and Kneeling. Helpful overlay graphics show how the human skeleton aligns in each of these positions. This video should help hunters as well as competitive position shooters. If you shoot silhouette, definitely watch this video!
BULLET TRAJECTORY — Factors at Play and Zeroing Strategies
Host Jessie Harrison (formerly Jessie Duff) and Veteran Air Force Sniper and Long Range Expert George Reinas help us understand the factors behind bullet trajectory. NOTE: There are some exaggerations in the graphics in the videos, and inconsistent terminology use, but it’s still a helpful basic primer on the subject of trajectories. This popular video has over 1 million YouTube views.
INTERNAL Ballistics — Cartridge Ignition and Bullet in Barrel
What happens inside the barrel of your gun when you pull the trigger? In this edition of Firearm Science, Jessie Harrison goes over internal ballistics, which studies the combustion of propellant, the pressure developed, and the motion of the bullet along the bore of the barrel. There are some good 3D animations showing how the powder charge ignites and the bullet moves through the barrel.
CHOKE TUBES and Shot Patterns — Shotgun Science
With over 2.2 million YouTube views, this shotgun-centric video is the most popular of all the NRA Firearms Science series videos. Here Olympic trap shooter Corey Cogdell explains how choke tubes affect a shotgun’s shot pattern in this edition of Firearm Science. We recommend that all Shotgun hunters watch this video — it explains the effect of choke tubes very well.
ZEROING RIFLES for Long Range — Tech Tips
The process of zeroing rifles for long range is covered in this Firearm Science video featuring George Reinas, a veteran Air Force sniper. George demonstrates how to adjust his scope to compensate for bullet drop at long range. Our friend Dennis Santiago was involved in the making of this video, which was filmed at the Burbank Rifle & Revolver Club in Southern California.
EYE DOMINANCE — How to Determine Which Eye is Dominant
Host Jessie Duff and longtime shooter Krystie Messenger demonstrate how eye dominance affects aim and teach you how to determine your dominant eye in this edition of Firearm Science. There are very simple tests you can do to determine your eye dominance. This Editor is right-handed but left-eye dominant. All competitive shooters should check for eye dominance. If you are cross-dominant, you can alter your head position or put a paper patch on one frame of your shooting glasses.
Well folks, there are just two more days left in 2023. But there are still bargains to be had. We’ve found three cool promotions. First you can save 10% on a vast selection of products from Precision Reloading — this includes reloading supplies, tools, bullets, ammo, hunting gear and more. Just get in your order before 11:59 on New Year’s day, January 1, 2024.
If you’re looking to add to your firearms collection, there are significant discounts available on long guns from CZ and SIG Sauer. But you have to “seal the deal” in 2023. Get your orders in before 11:59 pm on December 31, 2023 to qualify.
Precision Reloading — Save 10% with Orders over $79
Here’s a great offer from Precision Reloading. Celebrate the New Year with 10% Off Savings on a huge selection of merchandise (pretty much everything in stock). Right now you can get 10% Off Your Order of $79 or more. Use Code NEW24 at checkout. NOTE: This offer ends Monday, 1/1/2024 at 11:59 pm CT.
Save Up to $100 on CZ Shotguns and CZ 600 Rifles
Are you in the market for a shotgun or a hunting rifle? Right now, through 11:59 pm on December 31, 2023, you can SAVE $50-$100 on a CZ Shotgun or SAVE $100 on CZ 600 Rifle. The CZ 600 REBATE applies to all CZ 600 centerfire rifles: CZ 600 TRAIL, CZ 600 RANGE, CZ 600 LUX, CZ 600 ALPHA, and CZ 600 AMERICAN. CLICK HERE for more information on all CZ Fall 2023 bargains.
Get $100 or $200 Coupon with SIG Sauer Rifle and Optic
Here’s cool combo deal if you’re looking for a top-end tactical rifle plus quality optic. Buy a gun/optics combo from SIG Sauer and you’ll get a $100 or $200 coupon to use in the SIG Sauer webstore. If the total cost for both FIREARM and OPTIC is $500 – $1,499.99, you get a $100 coupon code. If the total cost for both FIREARM and OPTIC is $1,500 or more, you’ll receive a $200 coupon code.
Free Shipping with $99+ Orders and All Optics at Midsouth
Here’s another useful promotion that runs through 11:59 pm on New Year’s Day, January 1, 2024. Midsouth Shooters Supply is offering FREE SHIPPING on all orders of $99 or more of current, in-stock merchandise. In addition, Midsouth is offering Free Shipping for optics purchases.
Share the post "Special End-of-Year Bargains — Save 10%, or $50-$200"
The U.S. Army Marksmanship Unit regularly published a reloading “how-to” article on the USAMU Facebook page. One excellent “Handloading Hump Day” post covered preparation of once-fired 5.56x45mm brass. This article, the first in a 3-part series, has many useful tips. If you shoot a rifle chambered in .223 Rem or 5.56x45mm, this article is worth reading. You can obtain once-fired Lake City 5.56x45mm brass for less than half the cost of premium .223 Rem brass.
This week, Handloading Hump-Day will answer a special request from several competitive shooters who asked about procedures for morphing once-fired GI 5.56mm brass into accurate match brass for NRA High Power Rifle use. The USAMU has used virgin Lake City (LC) 5.56 brass to win National Championships and set National Records for many years. In this 3-part series, we’ll share techniques proven to wring match-winning accuracy from combat-grade brass.
GI brass has an excellent attribute, worth noting — it is virtually indestructible. Due to its NATO-spec hardness, the primer pockets last much longer than most commercial brass when using loads at appropriate pressures.
Preparing Once-Fired GI 5.56 Brass for Reloading (Part 1 of 3)
Assuming our readers will be getting brass once-fired as received from surplus dealers, the following steps can help process the low-cost raw material into reliably accurate components.
1. Clean the Brass
First, clean the brass of any dirt/mud/debris, if applicable. Depending on the brass’s condition, washing it in a soap solution followed by a thorough rinsing may help. [This step also extends the life of the tumbling media.] Approaches range from low-tech, using gallon jugs 1/2 full of water/dish soap plus brass and shaking vigorously, to more high-tech, expensive and time-consuming methods.
2. Wet-Tumbling Options (Be Sure to Dry the Brass)
When applying the final cleaning/polish, some use tumblers with liquid cleaning media and stainless steel pins for a brilliant shine inside and out, while others take the traditional vibratory tumbler/ground media approach. Degree of case shine is purely personal preference, but the key issue is simple cleanliness to avoid scratching ones’ dies.
If a liquid cleaner is used, be SURE to dry the cases thoroughly to preclude corrosion inside. One method is to dump the wet brass into an old pillow case, then tilt it left/right so the cases re-orient themselves while shifting from corner to corner. Several repetitions, pausing at each corner until water stops draining, will remove most water. They can then be left to air-dry on a towel, or can be dried in a warm (150° F-200° F max) oven for a few minutes to speed evaporation.
Shown below are Lake City cases after cleaning with Stainless Media (STM). Note: STM Case cleaning was done by a third party, not the USAMU, which does not endorse any particular cleaning method.
NOTE: The USAMU Handloading (HL) Shop does not RE-load fired 5.56 brass. We use virgin LC brass with our chosen primer already staked in place. However, our staff has extensive personal experience reloading GI brass for competition, which will supplement the Shop’s customary steps. In handloading, as in life, there are many ways to accomplish any given task. Our suggestions are note presented as the “only way,” by any means. Time for loading/practicing is always at a premium. Readers who have more efficient, alternative methods that maintain top accuracy are invited to share them here.
3. Inspect Every Case
Once dry, inspect each case for significant deformation (i.e., someone stepped on it), damaged mouths/necks and case head/rim damage. Some rifles’ ejectors actually dig small chunks of brass out of the case head — obviously, not ideal for precision shooting. Similarly, some extractors can bend the case rims so badly that distortion is visible when spinning them in one’s fingers. These can be used for plinking, but our match brass should have straight, undamaged rims.
Dented case mouths are common, and these can easily be rounded using a conical, tapered tool, [such as a .223 expander mandrel. A dummy 7.62 or .30-06 cartridge with a FMJ spitzer can also work.] If most of your brass is of one headstamp, this is a good time to cull out any odd cases.
4. Check the Primers Before Decapping
Your clean, dry and inspected brass is now ready for full-length sizing, decapping and re-priming. Historically, primer crimps on GI brass have caused some head-scratching (and vile language) among handloaders. Our next installment will detail efficient, easy and practical methods to remove primer crimp, plus other useful handloading tips. Until next week, Good Shooting!
Accuracy Potential of Mil-Surp 5.56×45 Brass
So, how accurate can previously-fired GI surplus brass be in a good National Match AR-15? Well, here’s a data point from many years ago that might be of interest. A High Power shooter who wrote for the late Precision Shooting magazine took a Bill Wylde-built AR match rifle to a registered Benchrest match. He had no difficulty obtaining consistent 0.5-0.6 MOA accuracy at 200 yards using LC brass and a generic “practice” load that was not tuned to his rifle.
Share the post "How to Prep Milsurp 5.56 Brass for Match Use — USAMU Tips"
Now that it is wintertime, many of our readers will be switching to indoor shooting for a few months. Practicing at indoor ranges can be fun with both handguns and rifles (with permitted chamberings). But indoor shooters must be aware of noise issues and general safety concerns.
There are important safety and behavior rules you need to follow at a gun range. Sometimes bad range etiquette is simply annoying. Other times poor gun-handling practices can be downright dangerous. The NRA Blog has published a useful article about range safety and “range etiquette”. While these tips were formulated with indoor ranges in mind, most of the points apply equally well to outdoor ranges. You may want to print out this article to provide to novice shooters at your local range or club.
8 Tips for Gun Range Etiquette
Story by Kyle Jillson for NRABlog
Here are eight tips on range etiquette to keep yourself and others safe while enjoying your day [at the range]. Special thanks to NRA Headquarters Range General Manager Michael Johns who assisted with this article.
1. Follow the Three Fundamental Rules for Safe Gun Handling
ALWAYS keep the gun pointed in a safe direction.
ALWAYS keep your finger off the trigger until ready to shoot.
ALWAYS keep the gun unloaded until ready to use.
This NSSF Video Covers Basic Gun Range Safety Rules:
2. Bring Safety Gear (Eye and Ear Protection)
Eye and Ear protection are MANDATORY for proper safety and health, no matter if “required” by range rules or not. It is the shooter’s responsibility to ensure proper protection is secured and used prior to entering/using any range. Hearing loss can be instantaneous and permanent in some cases. Eyesight can be ruined in an instant with a catastrophic firearm failure.
3. Carry a Gun Bag or Case
Common courtesy and general good behavior dictates that you bring all firearms to a range unloaded and cased and/or covered. No range staff appreciates a stranger walking into a range with a “naked” firearm whose loaded/unloaded condition is not known. You can buy a long gun sock or pistol case for less than $10.
4. Know Your Range’s Rules
Review and understand any and all “range specific” rules/requirements/expectations set forth by your range. What’s the range’s maximum rate of fire? Are you allowed to collect your brass? Are you required to take a test before you can shoot? Don’t be afraid to ask the staff questions or tell them it’s your first time. They’re there to help.
5. Follow ALL Range Officer instructions
ROs are the first and final authority on any range and their decisions are generally final. Arguing/debating with a Range Officer is both in poor taste and may just get you thrown out depending on circumstances.
6. Don’t Bother Others or Touch Their Guns
Respect other shooters’ privacy unless a safety issue arises. Do NOT engage other shooters to correct a perceived safety violation unless absolutely necessary – inform the RO instead. Shooters have the right and responsibility to call for a cease fire should a SERIOUS safety event occur. Handling/touching another shooter’s firearm without their permission is a major breech of protocol. Offering unsolicited “training” or other instructional suggestions to other shooters is also impolite.
7. Know What To Do During a Cease Fire
IMMEDIATELY set down your firearm, pointed downrange, and STEP AWAY from the shooting booth (or bench). The Range Officer(s) on duty will give instructions from that point and/or secure all firearms prior to going downrange if needed. ROs do not want shooters trying to “secure/unload” their firearms in a cease fire situation, possibly in a stressful event; they want the shooters separated from their guns instantly so that they can then control the situation as they see fit.
8. Clean Up After Yourself
Remember to take down your old targets, police your shooting booth, throw away your trash, and return any equipment/chairs, etc. Other people use the range too; no one wants to walk up to a dirty lane.
Share the post "Shooting Indoors — Key Advice for Safe Shooting Sessions"
What if you could see a speeding bullet in the milliseconds it exits the muzzle of a pistol? How cool would that be… Well, the Mythbusters folks (Adam Savage and Jamie Hyneman) have made that possible. Using an exotic Phantom super-high-speed camera running at 73,000 frames per second, the Mythbusters recorded a .45 ACP bullet being fired from a 1911-type handgun.
Watch Mythbusters Super-Slow-Motion Pistol Video:
Watch this FULL SCREEN to see the amazing details of the flame and smoke exiting the muzzle.
What unfolds is spectacular. First you see a ball of flame as the bullet emerges from the barrel of the 1911, then two distinct, separate swirling clouds form as the bullet races toward the target. Watch the video a couple times — it’s mesmerizing.
Co-host Adam Savage is nearly rendered speechless by the remarkable slow-motion footage from the Phantom. Filmed at 73,000 frames per second, the video reveals a dance of pressure and fire that would otherwise be missed by the unaided eye.
Share the post "Watch .45 ACP Pistol with 73,000 Frames Per Second Video"
The NRA’s Shooting Sports USA magazine covers a wide spectrum of competitive shooting sports: F-Class, High Power, Palma, Shotgun (Trap/Skeet), Air Rifle 3P/Prone, Rimfire 3P/Prone, Target Pistol, and major Action Pistol events. Each month Shooting Sports USA releases a new issue with reports on major competitions for a wide range of disciplines. Along with the print magazines, the leading stories are posted on the SSUSA.org websites. In addition, every month the full magazine is released in digital format.
Shooting Sports USA recently released a web-based article featuring its twelve 2023 cover stories.
CLICK HERE to see all 12 Shooting Sports USA 2023 cover stories.
Below are four of our favorite Shooting Sports USA cover stories from 2023. Click each cover to read the full story via the Shooting Sports USA digital archive. Note, if this is your first visit, you will first see an NRA webpage requesting that you verify your age before reading the stories.
Sinclair Internationalhas released an interesting article about Case Concentricity* and bullet “run-out”. This instructional article by Bob Kohl explains the reasons brass can exhibit poor concentricity, and why high bullet run-out can be detrimental to accuracy.
Concentricity, Bullet Alignment, and Accuracyby Bob Kohl
The purpose of loading your own ammo is to minimize all the variables that can affect accuracy and can be controlled with proper and conscientious handloading. Concentricity and bullet run-out are important when you’re loading for accuracy. Ideally, it’s important to strive to make each round the same as the one before it and the one after it. It’s a simple issue of uniformity.
The reason shooters work with tools and gauges to measure and control concentricity is simple: to make sure the bullet starts down the bore consistently in line with the bore. If the case isn’t properly concentric and the bullet isn’t properly aligned down the center of the bore, the bullet will enter the rifling inconsistently. While the bore might force the bullet to align itself with the bore (but normally it doesn’t), the bullet may be damaged or overstressed in the process – if it even it corrects itself in transit. These are issues we strive to remedy by handloading, to maintain the best standard possible for accurate ammunition.
The term “concentricity” is derived from “concentric circle”. In simple terms it’s the issue of having the outside of the cartridge in a concentric circle around the center. That goes from case head and center of the flash hole, to the tip of the bullet.
Factors Affecting Concentricity
The point of using this term is to identify a series of issues that affect accurate ammunition. Ideally this would work best with a straight-walled case; but since most rifle cartridge cases are tapered, it equates to the smallest cross section that can be measured point by point to verify the concentric circle around the center. For the examples below, I’m working with .308 Winchester ammo.
Figure 1: The cartridge.
Figure 2: Centerline axis of the case, extending from flash hole to case mouth.
The case walls have to be in perfect alignment with the center, or axis, of that case, even if it’s measured at a thousandth of an inch per segment (in a tapered case).
Figure 3: Case body in alignment with its axis, or centerline, even in a tapered case.
The case neck must also be in alignment with its axis. By not doing so you can have erratic bullet entry into the bore. The case neck wall itself should be as uniform as possible in alignment and in thickness (see the M80 7.62x51mm NATO cartridge in Figure 5) and brass can change its alignment and shape. It’s why we expand the case neck or while some folks ream the inside of the neck and then turn the outside for consistent thickness, which affects the tension on the bullet when seated.
Figure 4: Neck in alignment with center of the case axis.
Figure 5: Variations in case neck wall thickness, especially on some military brass, can cause an offset of the bullet in its alignment. This is an M80 ball round. Note the distinct difference of the neck walls.
Having a ball micrometer on hand helps, especially with military brass like 7.62x51mm in a semi-auto rifle, where there are limits as to how thin you want the neck walls to be. In the case of 7.62 ball brass you want to keep the wall to .0145″.
Figure 6: A ball micrometer like this RCBS tool (#100-010-268) can measure case neck thickness.
Turning the outside of the neck wall is important with .308 military cases regardless of whether you expand or ream the neck walls. There are several outside neck turning tools from Forster, Hornady, Sinclair, and others. I’ve been using classic Forster case trimming (#100-203-301) and neck turning (#749-012-890) tools for 40 years.
Bullet Run-Out
The cartridge, after being loaded, still needs to be in alignment with the center of the case axis. Figure 7 shows a bad example of this, a round of M80 ball. A tilted bullet is measured for what’s known as bullet “run-out”.
Figure 7: An M80 round with the bullet tilted and not aligned with the axis. This will be a flyer!
Run-out can be affected by several things: (1) improperly indexing your case while sizing, which includes not using the proper shell holder, especially while using a normal expander ball on the sizing die (it also can stretch the brass). (2) The head of a turret press can flex; and (3) improper or sloppy bullet seating. This is also relevant when it comes to using a progressive press when trying to load accuracy ammo.
Mid Tompkins came up with a simple solution for better bullet seating years ago. Seat your bullet half way into the case, back off the seater die and rotate the case 180 degrees before you finish seating the bullet. It cuts down on run-out problems, especially with military brass. You also want to gently ream the inside of the neck mouth to keep from having any brass mar the surface of the bullet jacket and make proper seating easier. A tilted bullet often means a flyer.
Figure 8: Proper alignment from the center of the case head to the tip of the bullet.
(NOTE: This links to a Web Archive version of the original Sinclair Int’l article.)
*Actually some folks would say that if we are talking about things being off-center or out-of-round, we are actually talking about “eccentricity”. But the tools we use are called “Concentricity Gauges” and Concentricity is the term most commonly used when discussing this subject.
Share the post "Bullet Concentricity and Alignment — What You Need to Know"
Headed to SHOT Show in Las Vegas? Then you should download the FREE SHOT Show Mobile App. Available for all mobile devices, this App really makes it easier to plan your SHOT Show schedule, and navigate the floor of the Sands Convention Center. The 2024 SHOT Show Mobile App is now available for download. There are versions for Apple and Android smartphones and tablets. And there is even an Apple Watch version. Apple users will find the App in the App Store, Android users will find their version in the Google Play Store. Learn more at SHOTmobile.com.
Handy Interactive Map
The App includes an interactive map that can direct you from your current location to your next destination. Arrange your meetings with a handy scheduling calendar. And you can search for any SHOT exhibitor by name or product category. In addition, the App lists major show events as well as important new products.
SHOT SHOW 2024 APP FEATURES
— Locate Exhibitor Booths with searchable Vendor Database/Floor Map
— Build a personalized Schedule and bookmark Exhibitors
— Visit bookmarked Exhibitors with Quick Route Feature
— Multi-Device Sync for smartphones, tablets, laptops
— Up-to-date Exhibitor, Speaker, and Event information
The 2024 SHOT Show takes place January 23-26 at the Venetian EXPO and Caesars Forum in Las Vegas, Nevada. Media Day at the Range takes place Monday the 22nd in Boulder City. To learn more about SHOT Show, including seminar times, educational resources, event listings, and hotel/travel information, visit SHOTShow.org.
Share the post "Get FREE 2024 SHOT Show Mobile APP"
Here is a great winter project for readers with some wood-working skills. This is a wood rack that can hold a huge collection of sizing and seating dies. This was created by our old friend John Adams, one of our Forum’s very first members. Sadly, John passed away a decade ago. But we know he’d be pleased to see folks create a die rack like this.
John, a founder of IHMSA and a former owner of SAECO Tool Company, had a vast collection of dies and reloading tools. He had rifles of many different calibers so he needed a large selection of dies. While visiting John’s workshop, we were impressed with the wooden die rack he has constructed above his main reloading bench. This would be a great do-it-yourself project for your reloading room.
John’s Loading Die Rack is a simple flat plank of wood, about 3/4″ thick. It is mounted with wood side brackets to stand at eye-level above a tool chest. The Rack is set at about a 45° angle from vertical. This holds the dies securely, but they are still easy to move in and out of the rack. At the top rear is a flat section with a single row of dies mounted upright.
You can see that all the dies for a particular cartridge are arranged in a column, one above the other. The die sets’ respective cartridge types (e.g. 6 PPC, 6×47 Lapua, and 6XC) are marked with highly visible labels made with a label-printing machine. John also placed labels on many of the dies themselves.
Vintage RCBS Die Rack
Below is an older, metal die rack. These were once manufactured by RCBS, but they are no longer sold. John Adams managed to snag a couple from RCBS years ago. The design is handy, but you can achieve the same results with a home-made wood block (perhaps that’s why RCBS discontinued its metal rack).
Quick Access vs. the Rust Factor
WARNING: While it is handy to keep your dies in a rack, this leaves them exposed to the elements. If you reload in a basement or garage where it gets cold and damp, your dies will rust much more quickly out in the air than if they are kept enclosed in their original boxes, with a small desiccant pack. Always keep a thin layer of oil or corrosion blocker on your dies. We recommend Eezox or Corrosion-X for that task.
Share the post "Project — Build a Wood Rack for Your Reloading Dies"
Amazing Accuracy from 6mmBR Tubegun
You Can’t Believe How This Gun Shoots
A former competitive smallbore rifle shooter, ace trigger-puller Kirsten Joy Weiss tried a special New Year’s trick shot a few seasons back. In keeping with the festive New Year’s spirit, Kirsten attempted to shoot the cork off a champagne bottle. After a few unsuccessful tries, she managed to hit the cork with at least two shots. But alas the cork did not fly. She actually hit the cork, but it did not release. That was surprising…
