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March 2nd, 2025

O-Rings on Sizing Die Lock Rings Can Reduce Run-out

reloading die O-ring
reloading die O-ring

Here’s an inexpensive procedure that can help you load straighter ammo, with slightly better measured concentricity (i.e. less run-out) on the case necks and bullets. Simply use a Rubber O-Ring on the underside of the die locking ring. This allows the die to self-align itself (slightly) to the case that is being sized. Without the O-Ring, if the flat surface on the top of your press is not perfectly square with the thread axis, your die can end up slightly off-angle. This happens when the bottom of the locking ring butts up tight against the top of the press. The O-Ring allows the die to float slightly, and that may, in turn, reduce the amount of run-out induced during case sizing.

Top prone shooter GSArizona, who sadly passed in 2022, tried this trick and said it works: “Go to your local hardware store and get a #17 O-Ring (that’s the designation at Ace Hardware, don’t know if its universal). Slip the O-Ring on the die and re-adjust the lock ring so that the O-Ring is slightly compressed when the die is at the correct height. Size and measure a few more cases. You will probably see a slight improvement in neck concentricity as the die can now float a bit as the case enters and leaves it. This isn’t going to be a dramatic improvement, but it’s a positive one.”

We want to stress that adding O-Rings to sizing dies may help some reloaders, but we don’t offer this as a panacea. Try it — if using the O-Ring reduces measured runout that’s great. If it doesn’t, you’ve only spent a few pennies to experiment.

reloading die O-ring

Lee Precision makes die lock rings with built-in O-Rings. Lee’s distinctive lock ring design allows the same kind of self-alignment, which is good. However, Lee lock rings don’t clamp in place on the die threads, so they can move when you insert or remove the dies — and that can throw off your die setting slightly. By using an O-Ring under a conventional die lock ring (that can be locked in place), you get the advantages of the Lee design, without the risk of the lock ring moving.

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February 27th, 2025

Smart Tips for Reloaders from Sierra Bullets

Sierra Bullets Reloading Tips

Here are some really smart tips for hand-loaders compiled by Sierra Bullets. These suggestions were submitted by Sierra’s Facebook fans — and some are very valuable indeed. Some of these tips will help you load more accurate ammo. Other selections will help you stay SAFE — which should always be your #1 priority. For example, we concur with the advice to “Check and Double Check. Everything. Every Time”. Also definitely keep “One powder on the bench at a time” — that could be a life-saver. You may want to print these “words of wisdom” and place them on a wall in your loading room.

Reloading Safety Tips — Sound Advice

ALWAYS START LOW: “Just because a load manual says X grains of X powder with X bullet is max, your rifle could reach max pressure a grain or two before what the book says. Start low and work up.” — Walter Coats

BE SAFE and CAREFUL: “Check and double check. Everything. Every time. Only one type of powder on the bench at a time.” — Glen Lundgren

DON’T RUSH: “Be patient, don’t be in a hurry, have fun and find your rhythm. Just tell your family you’re putting yourself in ‘time-out’. They will understand.” — Erik Dyal

POWDER RULE #1: “One powder on the bench at one time, it might save your life.” — James A. Kimery

STAY FOCUSED: “Relaxed but concentrated attention. Have fun enjoying a great hobby and pastime but stay focused.” — Jim Caldwell

POLICE LOADING AREA: “Keep your reloading bench area clean and put items away ASAP.” — Eric J. Ford

BE PATIENT: “Focus, Focus, Focus — be patient — it AIN’T a race.” — William Stanley

RECORD YOUR LOADS: “Write down on a small card what you’re loading – bullet weight, powder weight, type of powder, and primer. And put it in the powder hopper. I am unloading .45 FMJ because I forgot what type powder was in the hopper.” — Michael Conniff

HAVE a PROCEDURE for INTERRUPTIONS: “If, for any reason, you have to leave the bench while in the process of dropping powder charges, turn the next case to be charged upside down in the loading block so you know where you left off.” — Bill Tinsley

LABEL EVERYTHING: “OCD is a good habit to have with your loading bench. CLEARLY label everything!” — Andy Pynckel

HAVE a GOAL: “Never start reloading or developing a load without a specific goal in mind. Second keep meticulous records.” — Peter Eick

RESEARCH THE JOB: “Read all you can about it before you start!” — Keith Shively

KEEP TRACK of the Brass: “I put all my primed brass upside down (primer up) and as I charge the casing, I (of course) flip it primer down.” — Mark Ewing

Click to Watch Hodgdon Pistol Reloading Video:

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February 24th, 2025

BargainFinder 492: AccurateShooter’s Deals of the Week

AccurateShooter Deals of the Week Weekly Bargain Finder Sale Discount Savings

At the request of our readers, we provide select “Deals of the Week”. Every Sunday afternoon or Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, optics, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.

NOTE: All listed products are for sale to persons 18 years of age or older. No products are intended for use by minors.

1. Natchez — Hodgdon H4350 and Varget On Sale

hodgdon powder sale
⏺️ Get popular H4350 and Varget powders now in stock

Hodgdon powders are top choices for many shooting disciplines, offering great accuracy, good velocity, and consistently low ES/SD. Consequently many of the most popular Hodgdon powders have been hard to find. But right now H4350 and Varget are in stock and on sale at Natchez. Get Varget one-pounders, and choose 1-lb or 8-lb jugs of H4350. Plus Hodgdon H4198 is also available now at Natchez. Stock up now while these popular powders are available.

2. Graf & Sons — ATN Optics Sale

atn optics sale
⏺️ Good prices on night vision scopes, binocs and other products

Have you been considering a night vision scope but not sure where to start? Check out the ATN Optics Sale where you can find a wide range of night vision scopes, binoculars, and IR units all on sale. Grab one now and head out and learn why legal night hunting has become so popular.

3. Creedmoor Sports — Starline Brass Sale

starline brass sale
⏺️ Starline makes great pistol brass and good value rifle brass

Starline Brass is high-quality yet affordably priced. We have had great luck with Starline pistol brass and the rifle brass is consistent and very affordable. Currently Creedmoor Sports has a big inventory of Starline pistol and rifle brass. Starline brass is quality, SAAMI spec with the ability to be reloaded many times.

4. Amazon — Derraco PCPS Priming Tool, $199.95

derraco primer tool sale
⏺️ Innovative precision priming tool mounts to press

Turn your 7/8-14 standard single-stage reloading press into a precision priming system with the Derraco PCPS Precision Priming die/Primer Seating Tool (#ad). This advanced tool is compatible with any reloading press that accommodates 7/8-14 reloading dies and standard T-shaped shell holders. For a wide variety of single-stage presses, this unique precision priming tool will consistently deliver high-precision results thanks to the precision adjuster and micrometer hard stop.

5. Natchez — Leupold Optics Sale

leupold scope sale
⏺️ Good prices on Leupold scopes, binoculars, and Red Dot sights

Leupold has long been a leading American optics maker, and Leupold offers great customer service and a fantastic lifetime warranty on scopes. If you need a new scope or binoculars, check out the Leupold Optics Sale at Natchez. A wide selection of Leupold scopes and binoculars are discounted 15% or more, while Red Dot and Reflex optics are $100 off. Plus, with this Leupold Sale, Natchez is offering FREE Shipping.

6. Sportsman’s WH — Bergara B-14 Hunter 6.5 CM, $659.97

bergara rifle sale
⏺️ Nice, affordable deer rifle with good camo stock

If you need a new hunting rifle consider the Bergara B-14 Hunter in 6.5 Creedmoor. The B-14 Hunter features a molded synthetic stock made of glass fiber reinforced polymer. As with the entire B-14 Series, the Hunter model delivers impressive function and accuracy with an attractive price that will appeal to serious big-game hunters. Made in Spain, this rifle delivers excellent quality and performance for the under-$700 price.

7. Amazon — Plano 52″ Wheeled Rustrictor Case, $193.47

plano rifle case sale
⏺️ Excellent big weather-proof case with wheels for easy movement

When traveling by air or in a vehicle, having a quality rifle case keeps your rifle and optics safe and secure. A great option is the Plano All Weather Rustrictor Tactical Gun Case(#ad). This rugged rifle case’s Rustrictor technology protects firearms against rust and corrosion caused by moisture or humidity. A VCI-infused resin and foam emitter blocks rust and corrosion 5x longer than competing products and the TSA rating means you can take it anywhere safely and securely.

8. Midsouth — FREE Steady Rest with Crimson Trace Scope Buy

crimson trace scope sale free shipping caldwell steady rest nxt bonus
⏺️ With Crimson Trace Scopes Get FREE Rest and FREE Shipping

This is a nice promo. The Crimson Trace scopes are on sale PLUS you get FREE Shipping. These scopes offer great value for the price. And here’s the real bonus — you get a handy shooting rest. Use the full Caldwell rest for for long guns. Or, for pistol shooting separate the rest and use just the front section. The Caldwell Steady Rest NXT MSRP is $37.99.

9. Amazon — Digital Trigger Pull Gauge, $17.99

trigger pull gauge sale
⏺️ Cool sub-$20 tool that works really well — great buy

The Pridefend Professional Digital Trigger Pull Gauge (#ad) offers great performance for a very low price. We’ve used this “smart” pull gauge with success on match rifle triggers. This gauge measures in 1 oz. increments from 0 to 12 pounds. The gauge display is easy to read and you can choose ounce, pound, or Kg units. Though it costs just $17.99, this digital gauge offers better consistency than many conventional spring-type gauges. Plus, when you do a sequence of multiple pull tests on one gun, the unit automatically calculates maximum, minimum, and average pull weights.

10. Amazon — Lyman BrassSmith Funnel with Inserts, $31.99

powder funnel sale
⏺️ Very useful kit we use — avoids powder spills

Having a good powder funnel really helps precision reloading. The Lyman Products Brass Smith Pro Powder Funnel System (#ad) is a great little system. Unlike plastic powder funnels, the aluminum DIE cast body and CNC-turned aluminum caliber-specific inserts are static-free to eliminate powder cling. The precision fit to your case necks eliminates spilled powder. The kit includes six laser-marked, caliber-specific aluminum inserts to fit calibers 22 to 338: .22, .243/6mm, .25/6.5mm, .270/7mm, .30, and .338. The inserts can be quickly and easily interchanged when changing cartridge types.

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February 24th, 2025

Shilen SWAP MEET in Texas on Saturday, March 15, 2025

Shilen Barrels Swap Meet Ennis Texas TX

The much-loved Shilen SWAP MEET will take place in Ennis, Texas on Saturday, March 15, 2025 from 8:00 am through 2:00 pm CDT. This will be at Shilen’s new, bigger and better production facility. If you are looking for some great bargains on gun gear, and are near the Dallas-Fort Worth area, definitely mark this date on your calendar. The Shilen Swap Meet is one of the best events of its kind, and Team Shilen will even deliver a complimentary lunch to attendees. Plus machines will run from 8:00 am to 11:00 am so you can see how Shillen crafts top-quality barrels.

No Vendor Fees, No Entry Fees, and FREE Lunch!
ANYONE can come and ANYONE can be a vendor. There are NO entry or vendor fees and the event will proceed rain or shine. There will be gun stuff everywhere –buy and sell as much as you like. There will be free lunch, as always.

There will be prize drawings — get signed up when you arrive so you can have a chance to win some free stuff. If you want to sell products let Shilen add you to the list of vendors on Shilen’s website. This is not required, you can just show up and set up. Call 972-875-5318 or send email to comments@shilen.com.

SHILEN SWAP MEET HIGHLIGHTS

Watch Barrel-Making. A Shilen crew will run barrel-making machines from 8:00 am to 11:00 am. Watch precision barrels being made. The techs will answer all your questions about the process.

Sign up for Door Prizes — Shilen Merchandise. There will be multiple drawings for free or discounted Shilen apparel or merchandise. Go to the sign-up table to be entered in the drawings.

Get Shilen Barrels and Actions at Huge Discounts. Shilen Barrels, Actions, and Barreled Actions will be sold at huge discounts on Saturday. “Swap Meet Barrels” were originally ordered by Shilen customers throughout the year, but orders were canceled or customers changed their mind on contour, chamber, etc. These barrels were placed back in stock for resale. When Swap Meet Time arrives any such barrels still remaining in stock are sold at huge discounts. NOTE: These barrels are in NO WAY factory “seconds” or any lower quality. The warranty on these barrels is the same as any other Shilen barrels.

Sell Your Own Gear. At the Shilen Swap Meet, you can Bring Your Own Table (BYOT). Register to sell anything gun-related: presses, reloading gear, stocks, triggers, scope rings — you name it. Vendor Space is available on a first come-first served basis, starting Saturday morning at 7:00 am. Email or call Shilen for more information. Email: comments@shilen.com. Call: 972-875-5318.

Shilen Swap Meet 2018 Ennis Texas TX

TIPS for Visitors: The SWAP MEET concludes at 2:00 pm. The best stuff sells fast, so if you are looking for something particular get there early! Keep an eye on the Shilen’s Swap Meet page for a preview of Vendors and the products they’ll be selling.

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February 23rd, 2025

Sunday GunDay: 6 Dasher Duo for Benchrest & Varmint Matches

6mm Dasher Shehane duo

Chuck’s Pair of Pennsylvania Dashers

The 6mm Dasher wildcat cartridge is very popular among competitive benchrest shooters, varminters, and even PRS competitors. So this Sunday we thought we’d showcase a matched Duo of Dasher rifles belonging to a Forum member Chuck L. (aka “Ridgeway”). The 6mm Dasher began as a wildcat improved version of the 6mmBR Norma cartridge. The Dasher has been very successful in competition, and now factory Peterson 6mm Dasher brass is sold by Grafs.com. And Alpha Munitions also offers high-quality 6mm Dasher cartridge brass.

Chuck has a prize pair of 6mm Dashers for competitive benchrest and varmint matches in Pennsylvania. Both guns feature Kelbly Panda RBLP actions, Bartlein 8-twist barrels, and Shehane Laminated Tracker Stocks. However, the two rifles are not exact twins, as you can see. One, which we’ll call the Big Dasher, is built on a Shehane ST1000 Tracker stock. The other gun, the Small Dasher, sports Shehane’s “Baby Tracker” stock — a design used with great success by Richard Schatz. The Big Dasher, optimized for 1000-yard competition, has a slightly longer freebore — 0.136″ vs. 0.104″ for the Small Dasher.

6mm Dasher Shehane duo

Specifications for the Dasher Duo:

Small Dasher (13.5-pounder): Chambered for 6mm Dasher with approximately .104 freebore and a .264 NK. (No way of knowing exactly since its freebore was set in a separate operation by Kelbly.) Components are: Shehane Baby Tracker laminated stock, Kelbly Panda RPLB action, Bartlein 1:8″ LV barrel at 26 ¾”, Kelbly Rings, Weaver T36, Jewell trigger. The barrel was chambered by Kelblys and the stock was bedded, glued and balanced by a shooting buddy (Forum Member johara1). Chuck clear-coated the stock with auto urethane. Total weight is 13 lbs., 4 ounces.

Big Dasher (1K Light Gun, 17-pounder): Chambered for 6mm Dasher with a .136 freebore and .264 neck (PTG Reamer). Components are: Shehane ST-1000 laminated stock, Kelbly Panda RPLB action, Bartlein 1:8″ HV 5R barrel at 28″, Shehane +20-MOA rings, Nightforce NXS 12-42x56mm, Jewell trigger. The barrel work, pillar installation, and bedding was done by Dave Bruno. The stock was clear-coated by Chuck with auto urethane. Chuck also made the rear butt plate and balanced the rifle. Total weight: 16 lbs., 13 ounces.

Chuck tells us: “I don’t get out shooting competition as much as I want due to time and family, but when I do compete, I shoot a Groundhog match at Southfork Rifle Club in Beaverdale, PA. Info on Southfork Club events can be found at Southforkrifleclub.com. The Southfork match is basically a 100-, 300- and 500-yard match with one sighter the entire match and 5 shots at each yardage for score. The Small Dasher, with the shorter ‘Baby Tracker’ stock, was set up for the Southfork Rifle Club’s ‘Light Unlimited’ class which has a 13.5-lb max weight.” (Editor: ‘unlimited’ is a misnomer for a weight-limited category.)

Chuck adds: “The Big Dasher with the heavy ST-1000 stock is set up for 1000-yard benchrest matches in Light Gun class. I shoot 1K matches with it at Reade Range in southwest Pennsylvania. One ironic thing is, it shoots the same load I’m shooting out of the lighter gun rather well. The only difference between the two chambers is the freebore is roughly thirty thousandths longer on the 1K gun (Large Dasher). I will also shoot this at Southfork in the ‘Heavy Unlimited’ class.”

6mm Dasher Shehane duo

Both Dashers Group in the Ones at 100 Yards
Chuck favors 107gr Sierra MK bullets in both Dashers. Other components are: Reloder 15 powder, Lapua cases, and CCI 450 primers. His main load for the Small Dasher is 33.0 grains of Reloder 15. This load shoots in the ones at 100 yards. For the Big Dasher Chuck reported: “I’m still working on a load, although the same 33.0 grain load shoots in the ones in the heavier gun as well. I’m still looking for more velocity and my ‘max’ node.”

Dasher Brass — Four Options

1. Buy Peterson 6mm Dasher Brass
In years past, you had to create your own Dasher brass, by fire-forming (with or without projectiles), or by hydro-forming. However, Peterson Cartridge now offers quality factory-made 6mm Dasher brass. This brass is available right now at Grafs.com.

6mm Dasher Shehane duo

If you do not want to waste time with fire-forming or hydro-forming, you can look for Peterson 6mm Dasher brass. This is excellent quality brass that has earned high praise from purchasers. The price — $62.99 for 50 cases at Graf’s (i.e. $1.26 per case) — is less than what you’d pay for Lapua 6mmBR brass, which is $143.28 for 100 cases or $1.43 per case. The advantage is that you save time, barrel life, and you won’t lose any cases to split necks. Peterson brass can be ordered from Grafs.com.

2. Buy Alpha Munitions 6mm Dasher Brass
Another great source for ready-to-run 6mm Dasher cartridge brass is Alpha Munitions. The made-in-USA Alpha 6mm Dasher brass is long-lasting and has been very popular with Benchrest and PRS/NRL competitors. Alpha 6mm Dasher brass costs $135.00 per hundred, or $1.35 per case. Unfortunately, as of 2/23/2025, this Alpha 6mm Dasher brass is out of stock, but it should be available later this spring.

alpha munitions 6mm dasher br brass 100 pack

One tip — as the capacity may vary slightly from Lapua 6mmBR brass fire-formed to 6mm Dasher, you should work up your load. Also, if you are chambering a new barrel you should get a chamber reamer that is optimized for the Alpha 6mm Dasher brass dimensions. User reviews of the Alpha 6mm Dasher brass have been highly positive: “Fantastic packaging and fantastic brass! It’s pricier than some other brands but there is a reason for that. It’s a quality product worth every penny.” — Chris Vaughn.

3. Fire-Form Dasher Brass with Bullets Hard in Lands
Chuck fireforms his Dasher brass for both rifles. Because he has a tighter-neck chamber, he neck-turns the brass first: “To fireform, I turn my cases down to fit the chamber and stop where the false shoulder makes snug contact with the chamber. Fire-forming rounds are loaded up with a 29-grain charge of H4895 or Varget and a 108gr Berger bullet seated hard into the lands about 0.020″ past initial contact with the rifling. It takes about three firings to make a nice clean Dasher case with a sharp shoulder.”

6mm Dasher case fire-forming fireform

Chuck anneals his Dasher brass regularly to help maintain consistency: “I anneal about every 3-4 firings. I have many cases that have about 10+ firings on them and they are still shooting well. The primer pockets are a little looser, but still hold a primer.”

4. Have Darrell Jones Hydro-Form Your 6BR Brass to 6mm Dasher

Darrell Jones DJ's Brass hydraulic hydro-forming cartridge brass 6 Dasher 6mmBR 6BR BRX BRDX
DJ’s Brass can hydro-form a wide variety of cases for a modest fee

6mm Dasher Shehane duoFire-forming all your own 6mm Dasher brass takes time, costs money (in bullets and powder), and consumes precious barrel life. Well there IS a better solution — you can have your new brass hydro-formed by DJ’s Brass to your exact specifications for a $60.00 per hundred, which includes annealing.

DJ’s Brass Service now offers custom case hydro-forming to your exact specs. Darrell Jones offers this service for a variety of popular cartridges: 6 PPC, 30 PPC, 30 BR, 6 BRA (BR Ackley), 6mm Grinch, 6 BRDX, 6 BRX, .260 Ackley, .284 Shehane and of course the very popular 6mm Dasher. After hydro-forming your brass, Darrell can also neck-up or neck-down the cases to meet your needs. He can also turn the necks to your specs for an additional $0.60 per case.

dj's brass hydroforming hydroform dasher 6mm brass

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February 19th, 2025

Brownells Hosts Second Amendment Day on 2/22/2025

brownells second amendment 2A day free Range 38 ammo gun rentals

Brownells hosts the 4th Annual 2A Day (Second Amendment Day) on February 22, 2025, a nationwide event dedicated to celebrating Second Amendment rights, advocating for their preservation, and strengthening the firearms community. On 2A Day, you can visit a participating range and take advantage of free firearm rental or limited free ammo. There are participating ranges in Scottsdale, Arizona; Johnston, Iowa; Ballwin, Missouri; Omaha, Nebraska; and Auburn, Virginia. And some other local ranges may offer free firearm rentals or limited free ammo. Or head to the range of your choice and shoot for fun.

brownells second amendment 2A day free Range ammo gun rentals

With support from sponsors including CCI, Federal, Fiocchi, Henry, Hornady, Leupold, Magpul, Remington, Smith & Wesson, and Volquartsen, 2A Day provides multiple ways for firearm enthusiasts to participate:

CELEBRATE — Brownells is partnering with shooting ranges across the country to offer free range time and limited complimentary ammunition for participants.

ADVOCATE — Brownells encourages gun owners to actively support the Second Amendment by engaging with lawmakers at both the state and federal levels. The Brownells 2A Day webpage provides links to help individuals contact their elected representatives.

JOIN — Gun owners are encouraged to join national and state organizations committed to protecting gun rights, such as the 2nd Amendment Foundation (SAF) and the Gun Owners of America (GOA). Brownells will donate 4% of all sales from February 18-23 to 2A advocacy groups.

Second Amendment Day Official Target (Download for FREE)

free target national second 2d 2nd amendment day brownells
CLICK image to Download FREE Target as PDF.

“February 22nd is a day we, as a nation, can recognize, celebrate and do our part to secure one of the most important rights guaranteed by our Constitution – the right to keep and bear arms,” said Pete Brownell, Chairman of the Board at Brownells. “I hope Americans from all walks of life visit the range on this one day – 2/22 … and safely exercise their Second Amendment right, which is the underpinning of safety and security in America.”

NSSF indoor range survey pistol shooters Southwick Associates range report
Photo courtesy Silver Eagle Group Shooting Range, Northern Virginia.

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February 19th, 2025

Basics of Reloading Powder Grain Shapes and Properties

Vihtavuori loading propellant reloading powder N133 N150 N140 N550 ball flake stick extruded perforated powders

POWDER GRAIN SHAPES — What You Need to Know

The shape of powder grains has a profound effect on the performance of the powder charge, as it concerns both pressure and velocity. There are multiple powder shapes including flake, ball, and extruded or “stick” (both solid and perforated).

So how does powder grain shape affect pressure and muzzle velocity?
In general, it can be said that powder that burns progressively achieves a desired muzzle velocity at lower maximum pressure than a powder that burns neutrally, not to mention a degressive powder. As grain size increases, the maximum pressure moves towards the muzzle, also increasing muzzle blast. Muzzle velocity and pressure can be adjusted by means of the amount of powder or loading density, i.e. the relationship between the powder mass and the volume available to it. As the loading density increases, maximum pressure grows.

All Vihtavuori reloading powders are of the cylindrical, single-perforated extruded stick type. The differences in burning rate between the powders depend on the size of the grain, the wall thickness of the cylinder, the surface coating and the composition. Cylindrical extruded powders can also have multi-perforated grains. The most common types are the 7- and 19-perforated varieties. A multi-perforated powder grain is naturally of a much larger size than one with a single perforation, and is typically used for large caliber ammunition.

Other types of powder grain shapes include sphere or ball, and flake. The ball grains are typically used in automatic firearms but also in rifles and handguns. The ball grain is less costly to produce, as it is not pressed into shape like cylindrical grains. Flake shaped grains are typically used in shotgun loadings.

Vihtavuori loading propellant reloading powder N133 N150 N140 N550 ball flake stick extruded perforated powders

Web thickness in gunpowder terminology means the minimum distance that the combustion zones can travel within the powder grain without encountering each other. In spherical powders, this distance is the diameter of the “ball”; in flake powder it is the thickness of the flake; and in multi-perforated extruded powders it is the minimum distance (i.e. wall thickness) between the perforations.

The burning rate of powder composed of grains without any perforations or surface treatment is related to the surface area of the grain available for burning at any given pressure level. The change in the surface area that is burning during combustion is described by a so-called form function. If the surface area increases, the form function does likewise and its behavior is termed progressive. If the form function decreases, its behavior is said to be degressive. If the flame area remains constant throughout the combustion process, we describe it as “neutral” behavior.

The cylindrical, perforated powders are progressive; the burning rate increases as the surface area increases, and the pressure builds up slower, increasing until it reaches its peak and then collapses. Flake and ball grains are degressive; the total powder surface area and pressure are at their peak at ignition, decreasing as the combustion progresses.

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Vihtavuori loading propellant reloading powder N133 N150 N140 N550 ball flake stick extruded perforated powders


This article originally appeared on the Vihtavuori Website.

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February 15th, 2025

Saturday Movies: Palma Showcase — The Rifles, The Discipline

Palma rifle eliseo krieger warner jewell trigger history prone iron sights kelly bachand

Right now the 2025 Southwest Nationals 1000-yard individual competition is underway at the Ben Avery range outside Phoenix. Along with the F-Class matches (for F-TR and F-Open), there is a “hard-hold” division with competitors shooting rifles with sling in prone position. At the SWN this sling division has two sub-classes: “A” for “Any Rifle, Any Sight” and “P” for Palma rifles. These Palma rifles must shoot with iron sights, and they are limited to two chamberings: .223 Remington (5.56×45) and .308 Winchester (7.62×51). These Palma rifles typically feature long barrels for enhanced velocity, and a sophisticated stock that offers multiple adjustments.

palma iron sight swn ben avery
Palma rifle division shooter at the Southwest Nationals a few seasons back.

Today’s Saturday showcase we features six videos showing key features of modern Palma rifles. In addition, we offer insight into loading the .308 Win cartridge for long-range accuracy. Even with iron sights, modern top-tier Palma rifles are capable of shooting exceptional scores at 600 to 1000 yards.

About Palma Rifle Competition
The Palma discipline is a prone Iron Sight competition that originated in 1876, making it the second oldest continuing rifle match in the world. Except for a hiatus in the late 1900s, there is a nearly 150-year history of Palma matches. The Palma Course of Fire includes stages at 800, 900, and 1000 yards. At each yard-line you get two (2) sighting shots followed by 15 shots for record, for a grand total of 51 shots.

Under U.S.A. Palma rules the gun must be a rifle with metallic sights chambered for .308 Win (7.62×51) or .223 Rem (5.56×45). Most of the rifles featured in these videos are chambered for .308 Winchester, but we do have a video of John Whidden shooting his .223 Rem Palma gun — you’ll notice the significantly reduced recoil. CLICK HERE for more information on Palma Rules.

bryan litz applied ballistics palma rifle
Here is Bryan Litz, creator of Applied Ballistics software, with his .308 win Palma rig.

Components of Modern Palma Rifle and Palma Competition Basics

Palma USMC rifle eliseo krieger warner jewell trigger history prone iron sights

Palma USMC rifle eliseo krieger warner jewell trigger history prone iron sights

We definitely recommend you watch this video. Hosted by SSG Robert Germanelo of the U.S. Marine Corps Shooting Team, this video explains the basic rules of Palma competition and covers the key features of a modern, tubegun-style Palma rifle. The featured rifle has a Eliseo Competition Machine stock, Krieger 30″ 1:13″-twist barrel, Defiance Machine single-shot Rem 700-compatible action, Jewell trigger, Warner Tool Aperture Rear Sight, and Stallings Machine “Right Sight” in the front.

John Whidden Shoots His Modern .223 Rem Palma Rifle


Palma USMC rifle whidden history prone iron sights

With the latest bullets, long barrels, and strong Lapua brass, the .223 Rem CAN compete successfully in modern Palma competition. Here we feature a .223 Rem Palma rig belonging to 5-time NRA Long Range Champion John Whidden. Watch video at 00:25 and you’ll see the recoil of Whidden’s .223 Rem Palma rifle is significantly less than a .308 Win Palma rig. John joked: “With the .223 Rem there is just a pop and a wiggle after the shot.” CLICK HERE for full 1200-word report on this rifle with many more photos.

Modern .308 Win Palma Rifle with Custom Anschutz-style Stock

Here a Palma competitor showcases his modern .308 Win Palma rifle built with an custom-made, Anschutz 1913 model-style stock with the main frame crafted by the host’s father. This rig has a 30″ barrel chambered for 155gr bullets. The video explains how the components were chosen, why the barrel is so long, and how the stock adjusts in numerous ways to fit the shooter’s particular prone style. Below is a diagram of the sight picture. This is covered at 1:56 in the video.

Palma USMC rifle anschutz krieger warner jewell trigger prone iron sights

Palma Rifles Shooting 1000 Yards at Bisley in the UK


Bisley .308 win UK Palma prone iron sights stickledown

This UK-produced video features Palma matches at the Stickledown Range at Bisley. This video showcases the Inter-Counties match, where competitors use iron-sighted Palma rifles on targets at 1000 yards. This video provides a good introduction to the Palma discipline as practiced in Great Britain.

Canadian Palma Fun — Nova Scotia Shooters at 900 Yards

In this video, filmed at a beautiful range in Nova Scotia, two Canadian shooters compete at 900 yards with their iron sighted .308 Win Palma rifles. The video combines three different views into one frame, so you can simultaneously see downrange, see the shooters, and see the shot impact on the electronic target display. The shooters fired .308 Win cartridges loaded with Vihtavuori N140 powder and 155gr Sierra #2156 PALMA bullets.

Ballistics Guru Shoots Palma at 800 Yards

The talented Bryan Litz, head honcho of Applied Ballistics LLC, demonstrates his shooting skills in this video. Watch Byran complete the 800-yard phase of the Palma course shot at Camp Atterbury, Indiana in the summer of 2008.

Palma Chambering and Bullet Weight Limits
There is, understandably, quite a bit of confusion concerning caliber limitations for Palma rifles and Palma competition. Some folks say you can shoot a .308 Winchester (or 7.62×51) with a bullet weight up to 156 grains. Others say you can shoot a .308 Win (or 7.62×51) with any bullet weight. Still others opine that you can shoot EITHER a .223 Rem (5.56×45) or a .308 Win (or 7.62 NATO).

So who is right? Well, all these viewpoints are correct in part. That’s because different rules apply in different venues. In most, but not all United States Palma competitions, you can shoot either a .223 Rem or .308 Win with no restriction on bullet weights. But in some U.S. Matches, most notably the Spirit of America, certain prizes are limited to .308s with 156gr max bullet weights OR .223s with 81gr max bullet weights. What’s the bottom line? In most USA Palma competitions you can shoot either a .308 or a .223 with no limit on bullet weight. In International Palma competitions you can shoot either a .308 or a .223 but the max bullet weight is limited.

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February 12th, 2025

Bigger is Better: Jumbo Press for Loading Huge ELR Cartridges

Ko2m king two miles ELR .416 Barrett cheytac .50 BMG Extreme long range press

In the ELR game, particularly the King of 2 Miles (KO2M), it’s “go big or go home”. The top shooters run large-capacity cartridges that push large-caliber, ultra-high BC bullets at very high velocities. Bullets launched by cartridges such as the .416 Barrett can sustain supersonic velocities at Extreme Long Ranges — and that’s what it takes to win. The .416 Barrett can launch a 550-grain solid bullet at 3000+ FPS.

.416 Barrett cartridge ELR .50 BMG RCBS press
Photo from ELR Competitor Corbin Shell.

2018 and 2019 Kings of 2 Miles Loaded on RCBS Presses
So how do you load jumbo cartridges such as the .416 Barrett? It takes a big, heavy, super-strong reloading press. We’ve learned that two recent King of 2 Miles champions, Paul Phillips (2019) and Robert Brantley (2018) both loaded their KO2M ammo on RCBS AmmoMaster .50 BMG presses. Phillips loaded .416 Barrett ammo, while Brantley loaded a similar .416 MCS cartridge.

In 2018, Robert Brantley topped the field using his custom .416 MCS cartridge. Then in 2019, Paul Phillips won the K02M competition shooting a .416 Barrett, with Brantley a close second. Both Phillips and Brantley use the RCBS AmmoMaster .50 BMG single stage press kit and RCBS .416 Barrett dies to hand-load for extreme long-range. “My ammo has been much more consistent after switching to the RCBS press and dies,” remarked Phillips, who runs the Global Precision Group. Brantley said he uses RCBS products for most of his reloading needs — from the dies and AmmoMaster, to the ChargeMaster and Brass Boss. His custom .416 MCS loads launch a 550-grain bullet more than 3,100 fps.

Ko2m king two miles ELR .416 Barrett cheytac .50 BMG Extreme long range press

Loading with RCBS AmmoMaster .50 BMG Press
This video shows reloading with the RCBS AmmoMaster .50 BMG press. While this video shows .50 BMG cases being loaded, the principles are the same for loading the .416 Barrett cartridge or other big rounds. Big cases need big presses!

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February 5th, 2025

1.240″ Group at 500 Yards — PacNor Barrels Can Definitely Shoot

6BR 6mmBR Preacher PacNor

You don’t hear much about PacNor barrels in long-range competition, but FORUM member Wes J (aka P1ZombieKiller), proved that they can shoot “lights-out” in a rig assembled by a talented gunsmith. A few seasons back, Wes decided to upgrade a 6mmBR for mid-range benchrest and varmint matches. Wes tells us: “Since I restocked my 6BR … I have not had a chance to shoot it much since I have been playing the 100-200 game. I decided to take it out and do some playing at 500 yards. I have to give some serious props to my buddy (and fellow FORUM member) ‘PREACHER’ who did the chambering and barrel work for me. He can certainly make a gun shoot good. The barrel is a PacNor 1:8″ twist. My load was 105gr Berger VLDs pushed by 29.6 grains of Varget.” The five-round, 500-yard group shot by Wes J with his 6BR, measured just 1.240″, as measured by OnTarget software. Now that’s one accurate rig!

Five by Five — 5-Shot Group at 500 Yards, 1.240″, 0.237 MOA
6BR 6mmBR Preacher PacNor

This Editor knows something about the potential of a PacNor barrel. I have a 3-groove stainless PacNor SuperMatch on a Savage-actioned 6BR. This barrel shoots honest quarter-MOA in calm conditions, and it cleans up super-easy. The interior finish is so good, I’ve never had to brush the bore or use abrasives, and after 750 rounds it shoots as well as ever. I attribute the easy cleaning to the fact the lands in a PacNor 3-groove are wide and flat, so they are gentle on bullet jackets. I think accuracy is helped by the fact that my PacNor runs on the tight side (0.236 land dimension) with a good amount of choke. That works well with the 105gr Lapua Scenars and 103gr Spencers I like to shoot. You can read more about my rifle, nick-named the “Poor Man’s Hammer”, in this Feature Article from our archives. On one particularly calm day, in the hands of my friend (and ace trigger-puller) Joe Friedrich, the Poor Mans’ Hammer put 3 shots in under 0.200″ (measured center to center) at TWO Hundred yards. If you get a good one, PacNor three-grooves can definitely shoot.

OnTarget SoftwareTarget Measurement with OnTarget Software
We used OnTarget software to measure the 5-shot group in the target above. This easy-to-use software is very repeatable, once you get a feel for plotting the shots. The latest On Target v2.25 Precision Calculator is FREE for a 15-day evaluation period. If you like it (and you will, trust us) there’s a modest $11.99 registration fee to activate the program. In addition to group size (in inches), OnTarget plots distance to aiming point, and the software automatically calculates the group’s vertical height, horizontal dispersion, average to center (ATC), and group size in MOA.

You can run a measurement on a scanned target or a photo of a target. You’ll need some known reference to set the scale correctly. The target above had a one-inch grid so it was easy to set the scale. Once you’ve set the scale and selected bullet diameter and target distance, you simply position the small circles over each bullet hole and the OnTarget software calculates everything automatically, displaying the data in a data box superimposed over the target image. To learn more about OnTarget Software, read AccurateShooter.com’s OnTarget Product Review. This article covers all the basics as well as some advanced “power user” tips. NOTE: Since the review was written, On Target has updated the software, and the free version now has a time limit.

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