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June 8th, 2020

For Less Run-Out, Try Rotating Your Cases During Bullet Seating

Bullet Seating Reloading rotate cartridge Run-out TIR

Here is a simple technique that can potentially help you load straighter ammo, with less run-out (as measured on the bullet). This procedure costs nothing and adds only a few seconds to the time needed to load a cartridge. Next time you’re loading ammo with a threaded (screw-in) seating die, try seating the bullet in two stages. Run the cartridge up in the seating die just enough to seat the bullet half way. Then lower the cartridge and rotate it 180° in the shell-holder. Now raise the cartridge up into the die again and finish seating the bullet.

Steve, aka “Short Range”, one of our Forum members, recently inquired about run-out apparently caused by his bullet-seating process. Steve’s 30BR cases were coming out of his neck-sizer with good concentricity, but the run-out nearly doubled after he seated the bullets. At the suggestion of other Forum members, Steve tried the process of rotating his cartridge while seating his bullet. Steve then measured run-out on his loaded rounds. To his surprise there was a noticeable reduction in run-out on the cases which had been rotated during seating. Steve explains: “For the rounds that I loaded yesterday, I seated the bullet half-way, and turned the round 180 degrees, and finished seating the bullet. That reduced the bullet runout by almost half on most rounds compared to the measurements from the first test.”

READ Bullet Seating Forum Thread »

run-out bullet

run-out bullet

Steve recorded run-out measurements on his 30 BR brass using both the conventional (one-pass) seating procedure, as well as the two-stage (with 180° rotation) method. Steve’s measurements are collected in the two charts above. As you can see, the run-out was less for the rounds which were rotated during seating. Note, the change is pretty small (less than .001″ on average), but every little bit helps in the accuracy game. If you use a threaded (screw-in) seating die, you might try this two-stage bullet-seating method. Rotating your case in the middle of the seating process won’t cost you a penny, and it just might produce straighter ammo (nothing is guaranteed). If you do NOT see any improvement on the target, you can always go back to seating your bullets in one pass. READ Forum Thread..

Permalink Bullets, Brass, Ammo, Reloading, Tech Tip 3 Comments »
May 20th, 2020

Huge Memorial Day Sale at Brownells Is Underway NOW

Brownells Memorial Day Sale 2020 May

Memorial Day is just five days away, and Brownells is running a big Memorial Day Sale right now to mark the occasion. You’ll find dozens of popular products at significant discounts — up to 56% Off. Save on AR Lowers/Uppers, Triggers, Optics, Chassis Systems, Magazines, Tools, Ammo and more. If you are a black rifle fan — this is a great opportunity to pick up AR-platform components and accessories at deep discounts. But you don’t want to delay too long — Brownells Memorial Day Sale runs through 11:59 pm on Monday, May 25, 2020. And take note — inventory may be limited on some of the sale items.

Here Are Some of the Featured Sale Items

Illustrated below is just a small selection of the sale items. There are hundreds of other products on sale including: Barreled Actions, Chassis Systems, Hunting Stocks, Priming Tools, Electronic Earmuffs, Berger Bullets, Leupold Scopes, Leica Rangefinders, Lapua Ammunition, S&W .22 LR Pistols and much more.

Brownells Memorial Day Sale 2020 May

Permalink Handguns, Hot Deals, News, Optics, Reloading No Comments »
May 12th, 2020

RCBS Lock-Out Die Helps Prevent Faulty Charges on Progressives

RCBS Lock-out dieIf you load pistol or rifle ammo with a progressive press, we strongly recommend you get a Lock-Out Die from RCBS. This unique reloading die will prevent your progressive press from advancing if the dispensed powder charge is more or less than about 0.3 grains too high or too low. The Lock-Out Die really works. Your Editor uses it on his RCBS 2000 progressive press. I can affirm that a Lock-Out Die has “saved my bacon” a half-dozen times over the years when there was an over-charge (which could cause a Kaboom) or a low charge (which could cause a squib load).

The Lock-Out Die works by using a central die detection rod that sets its vertical position based on the height of the powder column in the case. Through an ingenious design, if the powder column height is too low or too high, the rod locks in place as you start to pull the press handle. This halts the press before the ram can lift and the cartridge plate can advance. Unlike a beeping alarm system (which can be ignored or defeated), the Lock-Out Die physically stops the movement of the press ram and prevents a bullet being seated in the “problem” case.

RCBS Lock-out dieIt takes a bit of tweaking to get the Lock-Out Die detection rod setting just right, but once it is correctly positioned, the Lock-Out Die works smoothly in the background. The Lock-Out Die won’t interfere with the loading process unless it detects a high or low charge — and then it positively stops the progressive loading cycle.

While crafted for use in RCBS progressive presses, the RCBS Lock-Out Die can also be used on a Dillon XL Progressive (see video below) or Hornady Lock-N-Load progressive — though it does take up one station which could otherwise be used for a final crimp die (after the seating die). The RCBS 2000 has one more station than a Dillon 550/650, so it’s an ideal platform for using the Lock-Out Die.

Learn More at UltimateReloader.com
On the UltimateReloader.com website, run by our friend Gavin, you’ll find an excellent two-part series on the function and set-up of the RCBS Lock-Out Die. Part One explains how the Lock-Out Die functions, using cut-away illustrations. Part Two shows how to install and adjust the Lock-Out Die on various progressive presses. The video below shows setup of the RCBS Lock-Out Die on the Dillon XL-650 progressive press.

Images © 2011 UltimateReloader.com, used by permission.
Permalink Reloading, Tech Tip 2 Comments »
May 11th, 2020

Bargain Finder 242: 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.

1. Cabela’s — Thompson/Center Compass Rifle, $239.97

thompson center

Hunting season will be here in a few more months. If you need a new hunting rifle check out the Thompson/Center Compass in .270 Win or .30-06 Springfield. On sale now for just $239.97, these T/C rifles feature Free-floated 5R barrel, 3-lug bolt, lightweight synthetic stock with aluminum pillars, adjustable trigger, and 3-position safety. A detachable, rotary magazine is also included. NOTE: Cabela’s also has this rifle in .22-250 Rem for $259.97, still a great deal.

2. Amazon — Frankford Arsenal Intellidropper, $199.95

frankford arsenal intellidropper

There are many good digital powder scale/dispensers on the market. But one of the best new-generation machines is the Frankford Arsenal Intellidroper. This offers excellent controls, good drop speed and +/- 0.10 grain accuracy, plus an easy-to-use Mobile App. Right now on Amazon you can get the advanced Intellidropper for under $200! If you’re looking for a new “smart” digital powder dispenser with advanced features, this is an excellent deal. Intellidropper Review HERE.

3. Bruno Shooters Supply — Huge Primer Sale

primer sale

As primers have outstanding long-term shelf life, it makes sense to purchase primers in quantity when they are available at attractive prices. Right now Bruno Shooters Supply is running a huge PRIMER SALE featuring every brand and style in stock. Here’s a great opportunity to get a good supply of primers at attractive prices.

4. Camera Land — Konus 20-60x100mm Spotting Scope, $179.99

konus konaspot spotting scpe

Spotting scopes are vital tools for shooters. But they can be pricey, especially those with large front objective lenses. Enter the Konus KonuSpot-100 20-60x100mm. The big 100mm objective gathers more light — good for low-light shooting and observing. For the money, this is a surprisingly good spotter (though don’t expect it to compare with a high-end Kowa, Swaro, or Zeiss). And if you order now you can get a camera adapter, carry case, lens cleaning cloth, and smartphone adapter at no extra charge.

5. Midsouth — RCBS Partner Press Reloading Kit, $223.86

rcbs sale

With the stay-at-home orders, many shooters are using their new free time to get started in reloading. For novice reloaders, it makes sense to start with a kit that has most of the tools you need. The very affordable RCBS Partner Press Reloading Kit comes with Press, Powder Scale, Powder Funnel, Loading Block, Lube Tray, Neck Brushes, Dubur Tool, Load Manual and more. These Partner Presses work well for loading at the range, or use the compact Partner as a second press for depriming or bullet seating.

6. 5.11 Tactical Gear — 20% Off Site-Wide

5.11 tactical gear sale

5.11 is one of the top manufacturers of tactical gear. You’ll see 5.11 pants, bags, and shoes on the firing line at matches. And many first responders use 5.11 gear. Right now 5.11 Tactical is running a 20% off EVERYTHING SALE. That’s right — everything on 511tactical.com is on sale! What’s more, there is free shipping on orders over $35. Plus if you use Code ‘TOGETHER’ at checkout, you can get a free keychain multi-tool.

7. Sportsman’s Warehouse — All Howard Leight Products on Sale

howard leight sale

Need to upgrade your eye protection and/or hearing protection? Do your current muffs suffer from busted electronics or worn-out ear cups? Well here’s a great opportunity to save big on ear and eye protection. Right now there’s a great Howard Leight SALE at Sportsman’s Warehouse. Get All Howard Leight brand Safety Eyewear and Hearing Protection products at 20% OFF.

8. Palmetto State Armory — Springfield M1A Sale + Promo

m1a springfield

The Springfield M1A has an historic military heritage and is fun to shoot. If you’ve been looking to add an M1A to your collection, check out PSA’s Springfield M1A sale. Many M1A models are significantly discounted. Plus, with Springfield’s current Gear Up Promotion you get two FREE magazines PLUS a scope mount. With the discounts and the free gear, we figure you can get over $600 in value.

9. Amazon — Real Avid Chamber Boss, $29.99

ar 15 bore brush

Cleaning AR-platform rifle chambers can be a pain, especially when it comes to removing the carbon. We found the Real Avid Chamber Boss is very effective on those dirty AR chambers and internals. The Chamber Boss includes a carbon scraper specifically designed for the AR chamber extension. This kit also include a chamber brush, and 5 special star-chamber cleaning pads. All these components fit right into the Chamber Boss’s handle, making transport simple and easy.

10. Amazon — Ninety 3″ Stick-on Splatter Targets, $7.99

splatter targets

Here’s a great set of stick-on (adhesive) splatter targets. Shots appear as bright neon yellow halos — providing easy-to-see instant feedback. The $7.99 target packs include 10 sheets of black circles, 3″ in diameter, for shooting out to 300 yards and beyond. In addition, each sheet includes 8 smaller red center bulls plus 22 stick-on black dots. You can shoot the entire target sheet, or peel off one or more circles to stick on a target backer. These also work great indoors with pistols.

Permalink Bullets, Brass, Ammo, Gear Review, Hot Deals, Optics, Reloading 1 Comment »
May 7th, 2020

Progressive Presses — Video Showcase of Six Machines

ultimate reloading progressive press review dillon Mark 7 rcbs lee hornady

COVID-19 stay-at-home orders have created abundant free time at home for millions of Americans. To fill otherwise empty hours, we know many readers have been reloading ammo — LOTS of ammo. And quite a few of you folks are thinking of getting a progressive press to increase output. Because multiple operations take place with a single pull of a lever, a progressive press can produce way more ammo in a given period of time than any single stage press. With a progressive, on the ram up-stroke, the multiple stations can simultaneously remove spent primer, full-length size case, drop powder, seat bullet, and crimp (if desired). Most progressives are also set up to prime cases with the ram in the lower position — though some guys prefer to prime manually.

Progressive presses aren’t just for high-output pistol ammo or bulk rifle ammunition. Good progressives can be adapted to do certain reloading tasks for top-on-the line match ammo. You might use a progressive for decapping, priming, and sizing, then throw powder and/or seat bullets separately. Some Champion shooters do use progressives to load their match ammo! For example 5-Time National Long Range Champion John Whidden and 2020 Berger SWN F-Open Champion Jay Christopherson both use progessive presses for some (but not all) operations.

To help you get started with progressive presses, here are five videos from UltimateReloader.com that cover six popular machines, from the elite Mark 7 Evolution to the inexpensive Lee Pro 1000. With many of these machines you can add separate vertical bullet feeder systems that further increase loading efficiency.

Mark 7 Evolution Press — Distributed by Lyman

Dillon XL-650 vs. Dillon XL-750

RCBS Pro Chucker 7 with Bullet Feeder

Dillon 550C with 6mm Creedmoor and 9x19mm

Lee Pro 1000 Features and Operation

Better Safe Than Sorry — the RCBS Lock-Out Die
RCBS Makes a “Lock-Out Die” that senses the powder charge. This will halt the Progressive press if you have a double charge, or an undercharge. Your Editor has the Lock-Out Die on his RCBS Pro 2000. It has “saved his bacon” a half-dozen times over the years. It can be used on Dillon and Hornady progressives as well as RCBS machines.

Permalink - Videos, Gear Review, New Product, Reloading No Comments »
May 3rd, 2020

Bargain Finder 241: 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.

1. McMillan Fiberglass Stocks — Big Sale, up to 33% Off

McMillan Stock Sale

Are you looking for a very high-quality, premium fiberglass stock for your next hunting rifle or tactical rifle project? Now’s a great time to buy — McMillan Fiberglass Stocks is running a Major Stock Sale with substantial savings — up to 33%. Currently 19 popular models are on sale including A3, A4, A5, Z-10, Game Scout, XTR, McMillan Hunter and more. NOTE: While this sale was set to end Monday, May 4, 2020, the McMillan website still lists sale prices for many of the items — but don’t delay. See all sale stocks at McMillanUSA.com.

2. CDNN Sports — Remington Camo R15 16″ Barrel, $399.89

remington mossy oak camo camouflage short barrel AR15 MSR gun

Here’s a great-looking compact Modern Sporting Rifle Kit for hunters. This is a good value, with Remington R15 Upper and Lower finished in Mossy Oak Breakup Camo. Parts include Bushmaster 2-Stage Match Trigger, Aluminum handguard, and Yankee Hill Flash Hider. Price is great — just $399.89. But take note — this Kit is NOT ready to shoot. This Rem Kit is sold without bolt carrier group, charging handle, and magazine. But those are easy to purchase (or borrow from another AR-platform gun). So remember, buyers must supply their own bolt carrier group, charging handle, and magazine. It’s still an excellent value.

3. EuroOptic — Nikon Riflescope Closeout Sale

Nikon black scope sale

Nikon’s decision to stop selling riflescopes has created an amazing opportunity. If you’re in the market for a hunting or tactical scope, check out EuroOptic’s Nikon Closeout Sale. EuroOptic has a big selection — Tactical Closeouts starting at $99, ProStaff Closeouts starting at $109, and Nikon BLACK scopes discounted up to 40% off. Choose MOA or MRAD versions with a variety of reticle options. NOTE: The BLACK FX1000/X1000 Series Nikons are quality tactical scopes proven in PRS/NRL competition. (FX1000s are FFP.) You’d have to pay hundreds more to do much better. At just $449.95, 40% off the original price, the 4-16x50mm FX1000-FFP MRAD is a steal!

4. Midsouth Shooters — Big Rimfire Ammo Sale, All Types

17 hmr .22 LR 22LR .22 WMR midsouth ammo ammunition sale

Ranges are starting to open up, so grab your gear and go. It’s always fun to shoot rimfire rifles, as quality training ammo (such as SK or Norma) can be a tenth the cost of factory centerfire ammo — 12 cents/rd vs. $1.20/rd or more. Midsouth Shooters has a wide selection of rimfire ammo from Aguila, CCI, Hornady, Federal, Lapua, Norma, SK, and Winchester. There are many varieties of the most popular rimfire ammo types: .17 HMR, .22 LR, .22 Short, and .22 WMR. Midsouth also has some .17 Mach2 and .17 WSM.

5. Natchez — RCBS ChargeMaster Lite, $219.99

Chargemaster Lite Midsouth Sale

Do you need an electronic powder scale and dispenser? Check out this great deal at Midsouth Shooters Supply. Suggested retail for the ChargeMaster Lite is $299.99. Amazon’s best price for this unit is $289.99. But now you can get it for just $219.99 at Natchez. So you can save $70.00 with this sale! Put the money saved into bullets or powder. The RCBS ChargeMaster Lite is the modern second generation Scale/Dispenser, descended from the original ChargeMaster. The ChargeMaster Lite features an easy-to-use LCD touchscreen. Dispenser precision is plus/minus 0.1 grains. The unit comes with twin check weights and a convenient plastic cover for the powder pan.

6. Sportsman’s Warehouse — Ruger 9mm SR9 Pistol, $249.97

ruger sr9 9mm compact pistol handgun

We’ve shot the Ruger SR9 9mm pistol and we like the ergonomics MUCH better than a Glock. The SR9 is comfortable with a slim, ergonomic grip, reversible backstrap, and narrow stainless slide. The Ruger SR9 also includes ambidextrous manual safety and magazine release, built-in Picatinny rail, and adjustable high-viz 3-dot sight system. If you are looking for a standard 9x19mm pistol (4.14″ barrel), this is a great value — $249.97 at Sportsman’s Warehouse

7. MidwayUSA — Packs of Sight-In Targets or Spots, $3.74 Each

midwayusa target diamond stick-on sale discount

Here are two target products we really like, both deeply discounted this week. The Caldwell Shooting Spots Combo 12-Pack offers BOTH 1″ diameter and 2″ diameter day-glo orange self-adhesive dots with inner diamonds. You get 36 big dots plus 72 small dots in the 12-Pack for just $3.74. For Load Development we like the Caldwell 9-Diamond Sight-in Target 10-Pack. Each sheet has NINE blue double diamonds inside circles. The 16″ wide paper backer also has boxes for your load data, chronograph values, gun info, and group sizes. You can also get the 9-Diamond 10-Pack for just $3.74.

8. Brownells — Wipeout Foam Cleaner, $14.99

wipeout cleaner

Walking the firing line of the Berger SW Nationals this year, one cleaning product was mentioned over and over again and for good reason. Sharp Shoot R Wipe-Out foaming bore cleaner is a no-nonsense, easy-to-use bore cleaner that does a great job. We get best results with two applications of Wipe-Out after some wet patches. If you’re tired of long brushing sessions, give Wipe-Out a try — it really reduces brushing required. This is a great deal. The same 5 oz. can is $24.95 on Amazon.

9. MidwayUSA — Caldwell NRR 23 Youth Ear Muffs, $11.24

midwayusa NRR 23 youth kid ear muffs hearing protection

Young people are the future of our sport. Every shooter should have an extra pair or two of kid-sized earmuffs for those days when you have the chance to bring a young person to the range. Right now MidwayUSA has a great deal on Caldwell Youth Ear Muffs. For just $11.24, these 23 NRR-rated Youth Muffs are available in three kid-pleasing colors: Hot Coral (Red/Orange), Neon Blue, and Neon Green.

Permalink Bullets, Brass, Ammo, Hot Deals, Optics, Reloading No Comments »
May 1st, 2020

Reloading at the Range — Smart Option for Load Development

Glen Zediker Reloading at Range

Glen Zediker Reloading at RangeThe February 2013 edition of Shooting Sports USA magazine has an interesting feature by Glen Zediker. In this Transporting Success, Part I article, Zediker explains the advantages of loading at the range when your are developing new loads or tuning existing loads. Glen, the author of the popular Handloading for Competition book, discusses the gear you’ll need to bring and he explains his load development procedure. In discussing reloading at the range, Glen focuses on throwing powder and seating bullets, because he normally brings enough sized-and-primed brass to the range with him, so he doesn’t need to de-prime, re-size, and then re-prime his cases.

Zediker writes: “Testing at the range provides the opportunity to be thorough and flexible. You also have the opportunity to do more testing under more similar conditions and, therefore, get results that are more telling. Once you are there, you can stay there until you get the results you want. No more waiting until next time.”

Zediker starts with three-shot groups: “I usually load and fire three samples [with] a new combination. I’ll then increase propellant charge… based on the results of those three rounds, and try three more. I know that three rounds is hardly a test, but if it looks bad on that few, it’s not going to get any better.”

Glen reminds readers to record their data: “Probably the most important piece of equipment is your notebook! No kidding. Write it down. Write it all down.

RCBS Partner PressThere’s More to the Story…

Editor’s Note: In Zediker’s discussion of loading at the range, he only talks about throwing powder and seating bullets. In fact, Glen opines that: “there is little or no need for sizing.” Well, maybe. Presumably, for each subsequent load series, Zediker uses fresh brass that he has previously sized and primed. Thus he doesn’t need to de-prime or resize anything.

That’s one way to develop loads, but it may be more efficient to de-prime, re-size, and load the same cases. That way you don’t need to bring 50, 80, or even 100 primed-and-sized cases to the range. If you plan to reload your fired cases, you’ll need a system for de-priming (and re-priming) the brass, and either neck-sizing or full-length sizing (as you prefer). An arbor press can handle neck-sizing. But if you plan to do full-length sizing, you’ll need to bring a press that can handle case-sizing chores. Such a press need not be large or heavy. Many benchresters use the small but sturdy RCBS Partner Press, on sale now at Amazon for $77.99. You may even get by with the more basic Lee Precision Compact Reloading Press, shown in Zediker’s article. This little Lee press, Lee product #90045, retails for under $35.00.

Glen Zediker Reloading at Range

Permalink - Articles, Reloading 2 Comments »
April 30th, 2020

New Forster Bench Rest Powder Measure — Precise and Efficient

Forster Products Benchrest bench powder measure reloading cast iron 1/10th grain dispenser

While Long Range Benchrest, F-Class, and ELR competitors may want to measure their powder charges very precisely using expensive Force Restoration scales, for many shooting disciplines, a good thrown charge will do the job. And now, with Forster’s very smooth and precise new Bench Rest Powder Measure, many shooters may want to try throwing their charges. We honestly think you may be surprised at how accurate and repeatable this new measure is…

If you’ve been looking for a simple, efficient way to measure and throw your powder charges, you should give Forster’s Bench Rest® Powder Measure a try. The design of the cast-iron constructed tool features a long, narrow, powder charge reservoir that minimizes shearing, even with long extruded powders. Forster says, with most powders, and a little operator practice, this new Bench Rest Powder Measure can “achieve repeatability within 1/10th of one grain while throwing a charge every 4 seconds.”

Forster Products Benchrest bench powder measure reloading cast iron 1/10th grain dispenser

Here are comments from two early testers:

“Forster’s Powder Measure throws the IMR stick powders I use (IMR 4895, 4064, 4320) easier and more accurately than the other measures I have owned, those being Redding, Hornady, Belding & Mull.”
– Chris Straughn, longtime reloader and tool aficionado

“Forster’s Bench Rest Powder Measure is a welcome addition to any bench. The precision design and CAST IRON construction of this measure is part of the Forster tradition. The heart of the measure is the measuring chamber contained in the massive cast iron Charging Arm. The mass of the arm in conjunction with the small Cutting Surface in the measure itself provides for the smoothest rotation of any measure on the market. Large IMR extruded powders do not impede the smooth operation of the Bench Rest Powder Measure making it the most repeatable measure on the market.” — Vernon Smith, engineer and reloader since 1974

The Powder Measure (order number 010631) and optional Stand (order number 017941) are now available for sale and ready for immediate shipment. You can purchase direct from Forster or from leading retailers Grafs & Sons, and Midsouth Shooters.

Permalink Gear Review, New Product, Reloading 3 Comments »
April 28th, 2020

Vihtavuori Explains Powder Grain Shapes

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).

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.

So how does the 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.

Learn More with FREE Vihtavuori Reloading APP »

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


This article originally appeared on the Vihtavuori Website.

Permalink Bullets, Brass, Ammo, Reloading, Tech Tip 1 Comment »
April 27th, 2020

Bargain Finder 240: 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.

1. Camera Land — Kestrel Sportsman Weather Meter, $249.99

kestrel wind meter

All shooters need accurate wind velocity and direction info. One of the best wind tools is the Kestrel. Forum member Knotwild found an amazing deal on the excellent Kestrel Sportsman Ballistics Weather Meter. This unit features the enhanced Applied Ballistics G1/G7 solver, including Aerodynamic Jump, Spin Drift, and Coriolis corrections for accurate long-range shots. Grab the Kestrel Sportsman for just $249.99. This same Kestrel Sportsman costs up to $500 elsewhere.

2. MidwayUSA — Swarovski – Kahles Demo & Refurbished Sale

Swarovski - Kahles Demo & Refurbished sale

Swarovski and Kahles scopes are often considered top-of-the-line but are rarely found at a discount. Head over to MidwayUSA and check out the Swarovski & Kahles Demo and Refurbished Sale. There’s a great selection of rifle optics and spotting scopes for just about every discipline. If you’re looking to save serious $$ on top-notch glass for that new rig you’re building, here’s your chance.

3. Amazon — BOG DeathGrip Tripod, $124.99

BOG DeathGrip Tripod

Whether out in the field, at the range or shooting a PRS match, keeping your rifle stable in varying conditions is a must. If you’re tired of carrying a monopod and bags around, here’s your chance to replace them with something more practical and functional. Grab the BOG DeathGrip Tripod and you’ll have a stable platform to shoot from any position. It features a 3-position leg lock for use in prone, kneeling, sitting and standing positions. This stable shooting platform features an adjustment knob that controls up to 50 degrees of tilt and a clamping head that pans 360 degrees with tension adjustment.

4. Bruno Shooters Supply — Savage Action Sale

savage action sale

Many shooters want a custom gun but balk at the $1000+ cost of a custom action. They may settle for factory Rem 700 action but forget about Savage. Savage makes a really solid action on which you can build a very accurate varmint or match rifle. The founder of this site shot a Savage-action 6BR at 600-yard steel matches for many years. With a Pac-Nor barrel, that Poor Man’s Hammer 6BR delivered solid quarter-MOA accuracy and held a range record for many years. For a good price on a Savage Match action complete with trigger, check out Bruno’s Savage action sale.

5. Natchez and Midsouth– RCBS Reloading Kit Sale

rcbs press sale

Given pandemic concerns, many folks have decided to start loading ammo in larger quantities. For those just getting started in reloading, here are two excellent kits from RCBS. The RCBS AR Tactical Reloading Kit offers their Reloader Special 5 press and even comes with AR Series Dies: 5.56/.223, .308/7.62, .300 AAC Blackout, 7.62×39. Or you can choose the Rock Chucker Supreme Master Reloading Kit if you’re looking for a stronger press and more commonly sought-after accessories. Either way these are excellent starter kits, offering great value for money.

6. Midsouth Shooters — Lee APP Press, $54.88

lee app press sale

Sorry folks — this was such a great deal, the Lee APP Press sold out on Monday. However, the Deluxe version of the APP press, which includes a case-feeder, is still available for $75.49. The Deluxe APP Press features an innovative case/bullet feeder with Jaws that automatically open and grasp the bullet or case and move then into operating position.

Processing brass is a necessary evil in the reloading world. Many processing chores are best done with a dedicated press, but that can get expensive. Lee saw the need for a inexpensive yet efficient processing press and brought out the Lee APP Automatic Processing Press. This can efficiently handle tasks such as decapping, case sizing, and primer pocket swagging. Here are two videos that show how this unique Lee APP press operates.

7. Amazon — Frankford Arsenal Vibra Prime, $56.19

vibra prime

Filling primer tubes can be time consuming and hard on the hands. If you’re looking to fill those tube faster and with less effort check out the Frankford Arsenal Vibra Prime. With the ability to fill just about any brand of tube in less than one minute, this is a great time saver. This editor uses this tool all the time — and considers it a “must have” for every reloading bench.

8. Powder Valley — CCI & Federal Rifle Primers

rifle primers

Reloading components have been a tough to find commodity lately especially primers. If you’re on the hunt for standard or magnum rifle primers we found CCI 450 Small Rifle Magnum primers as well as the Federal GM205M Small Rifle MatchGrade primers at Powder Valley and with a limit of 5 per person that’ll still get you more than enough primers for the rest of the year. Powder Valley also has large rifle primers in stock at good prices.

9. CDNN Sports — Taurus Spectrum .380 ACP, $179.99

rifle primers

Here’s a very compact, easy-to-conceal carry gun that can fit in pants pockets and small purses. All edges are smooth and rounded for ease of carry, with minimal “printing”. These Taurus Spectrum .380 ACPs are available in four color combos: Black/gray, Black/tan, Black/green, and a stylish White/blue/gray combo. We tried these pistols at SHOT Show. They are comfortable in the hand and the trigger is decent. Right now this Taurus Spectrum pistol is just $179.99 at CDNN Sports, making it one of the least expensive handguns on the market.

10. Graf and Sons — Hinged Rifle Ammo Box Sale

rifle ammo box

It can be hard to find good compact ammo boxes for rifle ammo loaded with long match bullets. We like these Frankford Arsenal 50-round and 100-round hinged rifle ammo boxes. These are slightly taller than most plastic ammo boxes, so they are better suited for longer, match-length ammo. These Frankford boxes hold match ammo securely without taking up a lot of space like the big, green ammo carriers with handles.

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