Most of us assume that if we weigh our powder carefully (down to the tenth of a grain or less) we can achieve a uniform powder fill from case to case in our handloads. Weighing does ensure that the weight of the propellant in each case is the same, but is the column of powder the same by volume each time? “Not necessarily” is the answer. An interesting experiment by our friend Boyd Allen demonstrates that the manner in which you place kernels in the case can make a significant difference in the height of the powder column within the brass case.

Using a Gempro 250 scale, Boyd measured exactly 30.6 grains of Vihtavuori N-133 powder. He then inserted this powder in the same cartridge case multiple times. (The case has a fired primer in place.) But here is the key — Boyd used various filling techniques. He did a slow fill, and a fast fill, and he also experimented with tapping and drop tubes. What Boyd discovered was that you can start with the exact same weight of powder (in fact the very same set of kernels), yet end up with vary different fill heights, depending on how you drop the kernels into the case. Look at the photos. Despite variations in lighting, the photos show the same 30.6 grains of powder, placed in the same cartridge, with four different methods.

Using funnels with long drop tubes packs kernels more tightly, creating a shorter powder column. That allows you to get more propellant (by weight) into the case.

Boyd Explains the Procedure Used for his Experiment.

EDITOR’s NOTE: So there is no misunderstanding, Boyd started with a weighed 30.6 grain charge. This identical charge was used for ALL four fills. After a fill the powder was dumped from the case into a pan which was then used for the next fill technique to be tried. So, the powder weight was constant. Indeed the exact same kernels (of constant weight and number) were used for each fill.

Boyd writes: “I used the same powder for all fills, 30.6 gr. on a GemPro 250 checked more than once. All fills employed the same RCBS green transparent plastic funnel. The fast drop with the funnel only overflowed when it was removed from the case neck, and 15 granules of powder fell on the white paper that the case was sitting on. The fast-funnel-only drop with tapping, was done with the funnel in place and the case and funnel in one hand, while tapping the case body with the index finger hard, many times (about 20 fast double taps). My idea here was to “max out” the potential of this tapping technique.

The slow drop with the funnel and 10″-long .22 cal. Harrell’s Precision drop tube, was done by holding the scale pan over the funnel and tapping the spout of the pan repeatedly on the inside of the funnel about 1/3 down from the top, with the scale pan tilted just enough so that the powder will just flow. Many taps were involved, again, to max out the technique.

Again, to be clear, after each case filling, the powder was poured from the case back into the scale pan carefully. You may notice the similarity between the fast drop with the drop tube, and the funnel only with tapping. Although I did not photograph it, fast tube drop and tapping (combined) improved on tapping alone, but only to about half as far down the neck as the slow with drop tube. Due to the endless possible permutations, I picked four and left it at that.

I believe that I can make the rough judgment that the scale pan funnel and drop tube technique, which involved a longer drop period, and probably less velocity at the top of the tube, left more room in the top of the case neck than the slow drop from the measure with the same drop tube. You have both pictures, so you can make the comparison.” — Boyd

Does Powder Column Height Variance Make a Difference?
Boyd’s experiment proves pretty conclusively that the method of dropping a given weight of powder can affect the height of the powder column in the case and the degree of powder compression (when a bullet is seated). He showed this to be true even when the exact same set of kernels (of constant weight) was used in repetitive loadings. This raises some interesting questions:

1. Will subsequent cartridge transport and handling cause the powder to settle so the variances in powder column height are diminished?

2. If significant inconsistencies in powder column height remain at time of firing, will the difference in fill level hurt accuracy, or result in a higher extreme spread in velocity?

3. Is there any advantage (beyond increased effective case capacity) for a tight (low level) fill vs. a loose (high level) fill?

We don’t know the answer to these follow up questions. This Editor guesses that, if we tested low-fill-height rounds vs. high-fill-height rounds (all with same true fill quantity by weight), we might see meaningful differences in average velocity. I would also guess that if you fired 10 rounds that exhibited quite a difference in powder column heights, you might see a higher ES/SD than if you shot 10 rounds loaded with a very consistent powder column height (either high or low). But further testing is needed to determine if these predictions are true.

The U.S. Army Marksmanship Unit (USAMU) fields pistol teams as well as rifle and shotgun competition squads. Consequently the USAMU’s Reloading Shop loads tens of thousands of pistol rounds every year. In this article, the USAMU’s handgun experts talk about reloading for handguns — with smart tips on how to achieve superior accuracy with 100% reliability. This article, which offers important insights on COAL, primers, crimps and more.

This video shows .45 ACP centerfire pistol competitors at Camp Perry

Precision Pistol Reloading — Recommended Methods

Optimize the Taper Crimp
One often-overlooked aspect of handloading highly-accurate pistol ammunition is the amount of crimp and its effect on accuracy. Different amounts of taper crimp are used with various handloads to obtain best accuracy. The amount is based on bullet weight, powder burn rate and charge, plus other factors. It is not unusual for our Shop to vary a load’s crimp in degrees of 0.001″ and re-test for finest accuracy.

Use Consistent Brass
Brass is also important to pistol accuracy. While accurate ammunition can be loaded using brass of mixed parentage, that is not conducive to finest results, particularly at 50 yards. It is important for the serious competitor/handloader to use brass of the same headstamp and ideally one lot number, to maximize uniformity. Given the volumes of ammunition consumed by active pistol competitors, using inexpensive, mixed surplus brass for practice, particularly at the “short line” (25 yards), is understandable. However [at 50 yards], purchasing and segregating a lot of high-quality brass to be used strictly for slow-fire is a wise idea.

Importance of Uniform COAL
Uniformity of the Case Overall Length (COAL) as it comes from the factory is also important to achieving utmost accuracy. More uniform case lengths (best measured after sizing) contribute to greater consistency of crimp, neck tension, ignition/burn of powder charge, and so on. Cartridge case-length consistency varies from lot to lot, as well as by maker. Some manufacturers are more consistent in this dimension than others. [Editor’s note: It is easy to trim pistol brass to uniform length. Doing this will make your taper crimps much more consistent.]

Primers and Powders — Comparison Test for Accuracy
Pay attention to primer brands, powder types and charges. Evaluating accuracy with a Ransom or other machine rest at 50 yards can quickly reveal the effect of changes made to handload recipes.

Bullet Selection — FMJ vs. JHP
Bullets are another vital issue. First, there is the question of FMJ vs. JHP. A friend of this writer spent decades making and accuracy-testing rifle and pistol bullets during QC for a major bullet manufacturer. In his experience, making highly-accurate FMJ bullets is much more difficult than making highly-accurate JHPs, in large part due to the way the jackets are formed. Small die changes could affect accuracy of FMJ lots dramatically. The CMP now allows “safe, jacketed ammunition” in Excellence-in-Competition (EIC) Service Pistol matches, although wadcutter ammunition is prohibited. Thus, the option to use very accurate JHP designs simplifies the life of CMP Service Pistol shooters in pursuit of the prestigious Distinguished Pistol Shot badge.

Hopefully, these tips will be helpful to any pistol shooters interested in accurate handloads, not just “Bullseye” shooters. Small tweaks to one’s normal routine can pay big dividends in improved accuracy and make practice and competition more rewarding. Stay safe, and good shooting!

TOP IMAGE: SSG Greg Markowski, a shooter/instructor with the USAMU, fires his pistol during the 2018 Civilian Marksmanship Program’s National Pistol Matches at Camp Perry, Ohio. At that event, Markowski claimed the General Mellon Trophy, General Patton Trophy and the General Custer Trophy. U.S. Army photo by Maj. Michelle Lunato/released by Defense Visual Information Distribution Service.

If you want smoother bullet seating, inside neck lube can help. Forum member Ackleyman II likes to add a little Mica powder inside his case necks before seating bullets. This is easily done with the Forster three-brush neck lube kit. Ackleyman tells us: “Many loads that I have will not shoot well with a dry neck compared to a neck that is cleaned and lubed with this [Forster Dry Lubricator] — the best $15 you have ever spent.”

The Forster Case Neck Lubricator features three brushes attached to a tough, impact-resistant case with holes for bench mounting. The brushes accommodate all calibers from 22 to 35 caliber. The kit includes enough “motor mica” to process 2000 to 3000 cases and has a cover to keep dust and grit from contaminating the mica. By moving the case neck up and down on the correct mica-covered brush, the neck can be cleaned and lubricated at the same time.

Function: Lubricate case necks for easier resizing
Contents: Kit with base, lid, and three nylon brushes
Lubricant: Includes 1/10 oz. of Motor Mica, enough to process 2000-3000 cases

Neck Lubrication After Ultrasonic Cleaning or Wet Tumbling with Pins
If you wet-tumble your cases with stainless media and solvents or ultrasonically clean your brass, you may find that the inside of the case necks get too “squeaky clean”. The inside surface of the neck looses lubricity. In this situation, applying a dry lube can definitely be beneficial. CLICK HERE to see story about ultrasonic cleaning.

Do you know how gun primers are made — how the explosive elements are applied into those tiny cups? Find out by watching this video filmed at a Federal ammunition factory. It starts out with empty primer cups loaded, 1000 at a time, into trays using vibration (0:05 time-mark). While much of the process is automated, there is still a significant role played by production workers who apply a green, paste-like charging compound to the inside of hundreds of primer cups.

At the 0:17-second time-mark you can see the factory worker “charging” the primers with the priming compound. After the cups are filled, then the plate of cups “mates up with a plate of anvils” (0:40 time-mark). Then the primers are unloaded from trays and inspected.

Primer “Mysteries and Misconceptions” Article

There is an excellent article about primers on the Shooting Times website. This authoritative Shooting Times article explains the fine points of primer design and construction. The author reveals some little-known facts about primers and corrects common misconceptions. Here are some highlights:

Size Matters
Useful Trivia — even though Small Rifle and Small Pistol primer pockets share the same depth specification, Large Rifle and Large Pistol primers do not. The standard pocket for a Large Pistol primer is somewhat shallower than its Large Rifle counterpart, specifically, 0.008 to 0.009 inch less.

Magnum Primers
There are two ways to make a Magnum primer — either use more of the standard chemical mix to provide a longer-burning flame or change the mix to one with more aggressive burn characteristics. Prior to 1989, CCI used the first option in Magnum Rifle primers. After that, we switched to a mix optimized for spherical propellants that produced a 24% increase in flame temperature and a 16% boost in gas volume.

Foiled Again
Most component primers have a little disk of paper between the anvil and the priming mix. It is called “foil paper” not because it’s made of foil but because it replaces the true metal foil used to seal early percussion caps. The reason this little disk exists is strictly a manufacturing convenience. Wet primer pellets are smaller than the inside diameter of the cup when inserted and must be compacted to achieve their proper diameter and height. Without the foil paper, the wet mix would stick to the compaction pins and jam up the assembly process.

Read Full Primer Story on ShootingTimes.com

We are often asked “Can I get more velocity by switching primer types?” The answer is “maybe”. The important thing to know is that changing primer types can alter your load’s performance in many ways — velocity average, velocity variance (ES/SD), accuracy, and pressure. Because there are so many variables involved you can’t really predict whether one primer type is going to be better or worse than another. This will depend on your cartridge, your powder, your barrel, and even the mechanics of your firing pin system.

BE SAFE: Be cautious when changing primer types. Glen Zediker recommended decreasing your load ONE FULL GRAIN when changing to a different primer type, one that you haven’t used before.

Interestingly, however, a shooter on another forum did a test with his .308 Win semi-auto. Using Hodgdon Varget powder and Sierra 155gr MatchKing bullets, he found that Wolf Large Rifle primers gave slightly higher velocities than did CCI-BR2s. Interestingly, the amount of extra speed (provided by the Wolfs) increased as charge weight went up, though the middle value had the largest speed variance. The shooter observed: “The Wolf primers seemed to be obviously hotter and they had about the same or possibly better ES average.” See table:

You can’t extrapolate too much from the table above. This describes just one gun, one powder, and one bullet. Your Mileage May Vary (YMMV) as they say. However, this illustration does show that by substituting one component you may see significant changes. Provided it can be repeated in multiple chrono runs, an increase of 19 fps (with the 46.0 grain powder load) is meaningful. An extra 20 fps or so may yield a more optimal accuracy node or “sweet spot” that produces better groups. (Though faster is certainly NOT always better for accuracy — you have to test to find out.)

WARNING: When switching primers, you should exercise caution. More speed may be attractive, but you have to consider that the “speedier” primer choice may also produce more pressure. Therefore, you must carefully monitor pressure signs whenever changing ANY component in a load. In his books, the late Glen Zediker recommended decreasing your load ONE FULL GRAIN when changing to a different primer type, one that you haven’t used before.

Q: What is the most popular gun book in the history of the planet?

A: That distinction goes to the Shooter’s Bible, which has sold over 7 MILLION copies since it was first published over 80 years ago.

Released in October 2025, the 117th Edition of this respected resource is better than ever. This latest Shooter’s Bible boasts 608 pages with over 270 color photos and more than 1000 black-and-white photos. The latest 117th Edition features many new firearms as well as new optics. This paperback book is now just $24.92 on Amazon, 17% off the $29.99 list price.

Published annually for more than eighty years, the Shooter’s Bible is one of the most comprehensive firearms reference guides in print. The publishers claim that “nearly every firearms manufacturer in the world” is included. The 117th Edition also contains new and/or enhanced sections on ammunition, optics, and accessories, along with updated handgun and rifle ballistic tables. There are also extensive charts of currently available hunting and match bullets for hand-loaders.

While many shooters are now using the internet to get reloading data and equipment specifications, the Shooter’s Bible remains a valuable resource with a great legacy. As one recent Shooter’s Bible purchaser explains: “While it’s true that much of the information contained in the Shooter’s Bible can be found on the Internet, there are many of us who would first rather relax in our easy chair and page through the book at our leisure. If you find an item that catches your fancy, you can then follow up by going to their Web site.”

Another buyer observed: “This [2020 edition] is proof that, even with all the attacks on our 2nd Amendment right over the years, the industry has persevered and grown. I hope the day never comes when there will no longer be a reason to publish the Shooter’s Bible.”

The Shooter’s Bible contains a vast collection of firearms product information and descriptions. Hundreds of firearms are listed, complete with specifications and photos. Products from nearly all commercial gun makers on the planet are included.

More Great Gun Books From Shooter’s Bible Publishers

Here are three other books from the publishers of the Shooter’s Bible that you may want to add to your library: Guide to Cartridges; Gun Trader’s Guide; and Guide to Firearms Assembly, Disassembly & Cleaning (Vol. 2). These are all available in softback print and Kindle (digital) editions.

RCBS, one of the biggest names in the reloading and gun maintenance world, changed ownership a couple years ago. Hodgdon Powder Company (Hodgdon) acquired RCBS from Revelyst, a division of of Vista Outdoor (VSTO). Most operations of RCBS have been continued, and the full product line remains in production — presses, dies, powder measures, case prep tools, priming tools, scales and more.

Today’s Saturday Showcase feature some of the most popular and noteworthy RCBS products including single-stage, turret, and progressive presses, plus powder dispensers and other tools.

RCBS ChargeMaster Link Scale/Dispenser with Bluetooth

Having a modern, electronic powder scale/dispenser makes the hand-loading process vastly more efficient. The latest generation of powder dispensers are very accurate, and they can store charge settings for multiple cartridge types. The latest RCBS ChargeMaster Link dispenser has a modern interface, plus Bluetooth technology that “talks” to a handy App on your mobile device. The popular ChargeMaster Link is available now for $299.99 at MidwayUSA.

RCBS Combo Kit — Good Choice for Getting Started in Reloading

You can definitely save money by buying multiple reloading gear items in one combo package. RCBS offers a variety of Reloading Combo Kits which feature reloading press, powder measure, scale, priming tool, and other items. These range in price from $265-$620 on Amazon. This video reviews an RCBS Rebel Master Kit. This is a very complete starter set-up, sold for $449.99 at Midsouth.

Along with the press, we like many of the components in the Rebel Master combo kit. The powder measure works well as does the trickler, and the hand primer tool is reliable, with good feeding and plenty of leverage.

RCBS Partner Press

We think all serious reloaders should have a small, secondary single-stage press for repetitive tasks such as decapping primers. In addition, a small, compact press can be transported easily to the range. Load development can be done more efficiently when loading at the range, as you can easily modify seating depth and other variables. The RCBS Partner Press (#ad) is a great choice for a secondary press. This UltimateReloader video shows the key features of the Partner Press.

RCBS 6-Station Turret Press — Operation Tips

This editor has owned and used an RCBS Turret Press for over two decades. While certainly not as versatile/sophisticated as the Area 419 XERO turret press, this six-station RCBS press does its job handily. It is a good choice if you load multiple pistol cartridges. With six stations, you can install both a sizing and a seating die for three different cartridge types, such as 9mm Luger, .357 Magnum, and .45 ACP. It is currently $406.99 at MidwayUSA.

RCBS Brass Boss Case Prep Center

The RCBS Boss is a powered case prep center that performs multiple tasks efficiently. Priced at $214.99 on Amazon (#ad), the RCBS Boss boasts six variable, high-speed rotating stations (four at <350 RPM; two at <550 RPM). This unit is great for initial case prep (chamfering/deburring) and regular brass maintenance.

RCBS Summit — Set-UP and Field installation on Vehicle

The RCBS Summit Press (#ad) is a very unique, small footprint press that operates differently than most reloading presses. The cast-iron Summit has a large-diameter center column and die moves up and down to meet the cartridge. With this small footprint, the Summit can be used in the field. As you can see in the second video, one of our testers actually mounted a Summit Press on his vehicle (with a special pedestal) so he could load anywhere.

RCBS Bench-mount Priming Tool (Two Short Videos)

If you need to prime large numbers of cases, the RCBS bench-mount Auto Priming Tool can do so efficiently at a modest cost (currently $135.84 on Amazon #ad). It attaches to your bench so it is secure and stable. A vertical tube holds dozens of primers that feed into the pusher as you can see in these videos. Older guys who experience pain when gripping hand primer tools have praised this bench-mounted RCBS unit.

Choosing a Case Cleaning System

Here Kent Sakamoto of RCBS looks at the three main types of brass cleaning systems: Vibratory Tumbler, Wet Tumbler (with media), and Ultrasonic Cleaning Machine. Kent reviews the pros and cons of each system. Most gun owners can benefit by having an ultrasonic machine for parts cleaning as well as a tumbler for cleaning fired brass.

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Get WAY Better Groups with New Criterion Pre-Fit Custom Barrel

In our Shooters’ Forum, you’ll find a lengthy thread about accuracy problems with a Savage LRPV, chambered in 6mmBR. The gun would repeatedly split groups at 100 yards, and at 300 yards, the “flyers” would open up the groups to 1.5 MOA or larger. Interestingly, the factory test target (at right) showed a split group — not a good sign.

The gun’s owner, forum member LR_Shooter, tried a variety of tweaks: “I did this, done that… [changed] torque, tang floated, bedded action, recut chamber, and [adjusted firing pin]”. But nothing really helped. Frustrated, LR_Shooter asked his fellow Forum members for help. Much advice was proffered, including the novel idea of removing the middle action screw in the Savage 3-screw target action. Some of the advice proved helpful, but none of the suggested remedies produced a major improvement. This rifle, out of the box, tossed flyers and no amount of tweaking (or changes in shooting technique) really cured the basic problem. That is, until, the factory barrel got replaced…

New Criterion Pre-Fit Barrel Works Wonders
LR_Shooter acquired a Criterion pre-fit barrel from Jim Briggs at Northland Shooters Supply (NSS). These pre-fits are designed for easy installation with the standard Savage barrel nut. Wouldn’t you know it, with a new 30″ heavy-contour barrel on the LRPV, the gun started shooting way better. No more crazy fliers, no more split groups, no more excessive vertical. And the improvement came without any other major modifications. LR_Shooter reports: “I got a replacement barrel from Jim at NSS. It is a 30″ bull Criterion barrel. So far, without playing with torque screws and having my old setup… I’m very satisfied with the barrel I got. Now I have no problem getting [groups] under 0.25 MOA. Finally this thing can shoot!” The targets below, shot with the new Criterion barrel, speak for themselves. The left target was shot at 100 yards, while the target on the right was shot at 300 yards (very impressive).

Targets Shot with Savage LRPV Fitted with Criterion Barrel

Read Thread on Savage Accuracy Issues Fixed By Criterion Barrel

Moral of the Story — Sometimes A New Barrel Really Is the Right Solution
All of us have struggled at times with a rifle that won’t live up to expectations. This Editor personally struggled for over a year with a .260 Rem Savage with a factory tube. The gun tended to split groups and the POI walked as the barrel heated. I tried one powder/primer combination after another, working through a variety of seating depths over many months. I was persistent. Out of stubbornness, I just believed that sooner or later I’d find the magic load.

Well folks, sometimes there’s really nothing you can do about a sub-par barrel. It is what it is. To really improve a gun’s accuracy (particularly a gun with a factory tube), you may need to open your wallet and get a quality aftermarket barrel. Spending months trying one recipe after another may simply be an overwhelming waste of powder, bullets, and your precious time.

Albert Einstein supposedly said: “Insanity is defined as doing the same thing over and over again, and expecting different results.” Well that sort of describes my efforts with my .260 Rem. Once I had enough evidence that my barrel split groups no matter what load combo (and seating depth) I tried, it was time to pony up for a new barrel. When I did finally screw on a nice PacNor 3-groove SuperMatch, that Savage suddenly became a true tack-driver. As re-chambered in 6mmBR with the Pac-Nor, in calm conditions, my Savage will now consistently shoot in the twos with heavy bullets, and it can sometimes dip down into the ones with Berger 80gr flat-base bullets. The moral of the story here is simple — don’t waste weeks or months chasing your tail with a barrel that just won’t deliver (after a reasonable amount of testing). Save up for a custom barrel, get it chambered properly, and stop your cycle of frustration.

Here is great news for score benchrest shooters. For years 100/200 yard score competition has been dominated by the 30 BR cartridge, which offers outstanding accuracy and consistency with .30-caliber bullets. But creating a .30 BR cartridge took time and effort forming the brass from a parent typically using Lapua 6mm BR Norma brass or Peterson 7mm BR brass.

Now that has changed. Alpha Munitions now offers excellent, ready-to-shoot 30 BR brass. No separate fire-forming or hydro-forming is required. This Alpha 30 BR brass has shown excellent accuracy both with a no-turn neck and as turned for a tighter chamber. Case life is excellent as Alpha brass is strong with good longevity. This impressive new 30 BR brass is now available exclusively through Bruno Shooters Supply. It is IN STOCK now and priced at $159.99 for 100 pieces.

Ace benchrester and gunsmith Speedy Gonzales has praised this new Alpha 30 BR brass: “Well fellow score shooters, the days of expanding 6mm or 7mm brass up to make 30 BR brass are just about over. UPS just dropped off the test samples for me to test, and should be in full production soon. I will post a full video after testing and give you all the full report. 30 BR brass by Alpha will be sold exclusively through Bruno Shooters Supply and has an order list up and running[.]”

Over the years, the U.S. Army Marksmanship Unit (USAMU) published a series of reloading articles on its Facebook Page. In this article, the second in a 3-part series, the USAMU covers the process of loading competition pistol ammunition. The authors focus on two key elements — the taper crimp and the quality/uniformity of the original brass. If you shoot pistol competitively, or just want to maximize the accuracy of your handguns, read this article. The taper crimp tips are very important.

Loading Accurate Competition Pistol Ammunition — Part 2 of 3

One often-overlooked aspect of handloading highly-accurate pistol ammunition is the amount of taper crimp used, and its effect on accuracy. (NOTE: this article pertains to loading for semi-autos — revolver crimp techniques involve some quite different issues.) Briefly, different amounts of taper crimp are used with various handloads to obtain best accuracy. The amount is based on bullet weight, powder burn rate and charge, plus other factors such as case neck tension. During machine-rest testing of experimental Service Pistol ammunition, many variables are examined. Among these, our Shop often varies a load’s crimp in degrees of 0.001″ when re-testing for finest accuracy.

How to Measure Taper Crimp on Pistol Cartridges
One question that often arises is, “How do I measure the taper crimp I’m putting on my cartridges?” Using the narrow part of one’s dial caliper jaws, carefully measure the case diameter at the exact edge of the case mouth on a loaded cartridge. It’s important to take several measurements to ensure consistency. Also, be sure to measure at several places around the case mouth, as case wall thickness can vary. After measuring 2-3 cartridges with a given crimp setting, one can be confident of the true dimension and that it can be repeated later, if needed.

However, for good results, one must use brass from one maker due to variances in case wall thickness. For example, the same degree of crimp that imparts a measurement of 0.471″ with Brand X brass may result in 0.469″ with Brand Y. Thus, for best accuracy, using brass from the same manufacturer is important — particularly for 50-yard Slow Fire. In a perfect world, it is better still to use brass from one lot number if possible. With the popularity of progressive presses using interchangeable tool heads, keeping separate tool heads adjusted for each load helps maximize uniformity between ammunition lots.

Brass Uniformity and Accuracy
Brass is important to pistol accuracy. While accurate ammunition can be loaded using brass of mixed parentage, that is not conducive to finest results, particularly at 50 yards. It is important for the serious competitor to pay attention to his brass – even if only for the 50-yard “Slow Fire” portions of “Bullseye” matches and practice. By segregating brass as described above, and additionally keeping track of the number of times a given batch of cases has been fired, one can ensure case neck tension and case length are at their most uniform.

Given the large volumes of ammunition consumed by active pistol competitors, using inexpensive, mixed surplus brass for practice, particularly at the “short line” (25 yards), is understandable. In NRA Outdoor Pistol (“Bullseye”), the 10-ring is relatively generous — especially for a well-trained shooter with an accurate pistol and load. However, for the “long line” (50 yards), purchasing and segregating a lot of high-quality brass to be used strictly for slow-fire is a wise idea. To keep track of your brass on the line, use a unique headstamp marking with 1 or 2 colors of marking pen ink.

Uniform Cartridge Overall Length is Important
Cartridge case Overall Length (OAL) uniformity as it comes from the factory is important to achieving utmost accuracy. More uniform case lengths (best measured after sizing) contribute to greater consistency of crimp, neck tension, ignition/burn of powder charge, headspace (rimless cartridges), etc. Cartridge case-length consistency varies noticeably by maker and, with lesser manufacturers, also from lot to lot. Some manufacturers are more consistent in their dimensions than others, and also in the hardness/ductility of their brass. Similarly, pay attention to primer brands, powder lot numbers, etc.

Consider Using a Lock-Out Die with Progressive Presses
When reloading pistol ammo with a Progressive press, we strongly recommend the use of a lock-out die, or other system that can detect double charges or low charges. If your progressive is manually advanced, the possibility of a double charge is very real — and that can have disastrous consequences.

On UltimateReloader.com website you’ll find an excellent two-part series on the function and set-up of the RCBS Lock-Out Die. This die prevents loading if a high or low powder charge is detected. The video below shows setup of the RCBS Lock-Out Die on the Dillon XL-650 progressive press.