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December 13th, 2018

Just in Time for Christmas — Stunning Ruby Red F-TR Rig

X-Max Barnard Action V-block Welgemoed action Mostert carbon stock
Proud owner Dirk L. says: “This is my first build — never thought it would be a .308!”

Here’s a handsome F-TR rifle with a beautiful red stock that suits the holiday season. This ruby red beauty was a recent addition to the long-running Pride and Joy Rifle thread in our Shooters’ Forum. The rifle belongs to Forum member Dirk L. (aka “Pinkes”) who hails from South Africa. This is a .308 Win, with 30″ Bartlein barrel, and X-Max action. The stock is a custom composite with carbon fiber for strength and lightness. And yes this rifle shoots as good as it looks. Check out the impressive 5-shot groups below…

X-Max Barnard Action V-block Welgemoed action Mostert carbon stock

X-Max for Xmas — Impressive Metal-work
Along with that beautiful red stock, this F-TR rig has some very cool features, including a South African-crafted X-Max Action. The action designer Piet Welgemoed explains: “The X-Max action body is 17-4PH stainless steel pre-hardened to 44° Rockwell. Bolt and handle are one-piece stainless steel, nitrated to 55° Rockwell 0.2mm deep. Bolt is also fluted. Inside is the firing pin with washers (see below). The washer cuts the lock-time almost by half and also weighs less. The bolt-knob and bolt shroud are CNC aluminum. The action has very tight tolerances.” The complete action with +20 MOA rail and trigger weighs 1.475 kg (3.25 lbs).” Owner Dirk notes that the competition trigger, set at 3.0 ounces, is also Welgemoed’s design.

X-Max Barnard Action V-block Welgemoed action Mostert carbon stock

Wicked Accuracy with Bartlein Barrel, Varget, and 220gr SMKs
This gun has already proven to be a great shooter. Below are two FIVE-shot groups at 100 meters. The group on the left is in the low threes, with three of five shots essentially in one hole. Dirk loads Lapua .308 Palma brass and #2231 200gr Sierra Matchkings, seated 20 thousandths off the lands. The Varget powder and CCI primers drives the 200gr SMKs at 2620 fps.

X-Max Barnard Action V-block Welgemoed action Mostert carbon stock

Brass: Lapua .308 Win Palma (small primer) | Primers: CCI 450 | Powder: Varget
Bullet: New 200gr SMK #2231 | Seating: 0.020″ Off | Velocity: 2620fps

Composite Stock — One of Three by Renier Mostert
And what about that beautiful red stock? The rifle’s owner told us: “This was one of three similar stocks built as a test run by Renier Mostert, a professional composite stock builder and former benchrest shooter from Pretoria, South Africa. Renier was approached by three friends, who were all looking for decent, custom-built FTR composite stocks. There were a number of stocks available to them (mostly imported), but [those] were either made of wood or aluminum. The requirements for the composite stock build was very specific. Aluminum V-Blocks for the actions were required. The stocks had to be light enough to carry some beefy barrels and optics without compromising rigidity and still be within the F-TR weight limit. The three friends supplied Renier with an imported wooden stock as their shape of choice. Although the shape was quite straight-forward, Renier made a few dimensional changes to features which were not symmetrically correct on the sample, and then built a mold from it.”

X-Max Barnard Action V-block Welgemoed action Mostert carbon stock

Renier uses several methods to craft composite stocks for various disciplines: F-Class, benchrest, competition rimfire, hunting, and tactical. For this build he chose to build a shell constructed of a well-planned mix of woven fiberglass cloth and bi-directionally woven carbon fiber with aerospace quality epoxy resin to reduce weight in some areas and increase stiffness in other areas. He used a wet lay-up process where the two halves gets laid up and joined together while still wet to form a complete, continuous shell. The closed mold gets cured under pressure in an oven for several hours at very specific temperatures. After curing, the shell is filled with a high-tech mix of lightweight filler and epoxy resin. The composition of the mix varies in different areas of the stock to facilitate more strength or reduced weight where applicable.

X-Max Barnard Action V-block Welgemoed action Mostert carbon stock

After the initial build, the aluminum hardware was installed. An adjustable cheek piece, Anschutz rail, and adjustable recoil pad mechanism were installed. The stocks were inletted by Renier, while the final fitting and bedding procedures were left for each customer’s gunsmith to complete. The stocks were light enough for the rifles to comfortably be within the F-TR weight limit. A barrel tuner was mounted on one of the rifles, and the rifle still made the F-TR Class weight limit, 8.25 kg (including bipod). The bipod shown in photos in the SEB Joy-Pod.

X-Max Barnard Action V-block Welgemoed action Mostert carbon stock

Paint — Candy Apple Red over Metallic Silver Base
After final gunsmithing, the stocks were returned to Renier Mostert for custom painting. The rifle featured in this article was done in Candy-Apple Red paint from DNA Paints (an Australian company). To get the desired effect, a metallic silver base coat was used, enhanced with a modest amount of medium coarse glitter, followed with multiple layers of candy until the correct shade was achieved. A high-quality automotive clear coat was used to finish off the paintwork.

Permalink - Articles, Gunsmithing, News 6 Comments »
December 13th, 2018

Smart Tip for Winter Storage in Gun Safes — Bag Your Guns

gun storage bag silicone fleece anti-corrosion safe protection

Wintertime is here, the season of cold and damp… and RUST. There’s snow on the ground in many parts of the country. If you want your fine firearms to remain pristine and rust-free through the winter months, it’s wise to protect then while they are stored in a safe. You should protect blued surfaces with a rust-blocker. In addition, we recommend storing guns in protective sleeves. Our take on Bore-Store Gun sleeves is simple: They work great, so buy them and use them — for ALL your valuable firearms.

These thick, synthetic-fleece sacks cushion your guns, preventing nicks and scratches. The breathable fabric wicks away moisture, and the fibers are coating with corrosion inhibitors. I personally use Bore-Stores for in-safe storage with all my guns, and I have never had one of my guns rust inside a Bore-Store, even when I lived a stone’s throw from the ocean.

Bore-Store Gun Sacks
Photo from Pistoleer.com, a Bore-Store vendor.

Bore-Stores are offered in a wide range of sizes, so you can find something to fit everything from a Snub-nosed revolver to a 32″-barrelled 50 BMG. Rifle-size Bore Stores can be purchased for $13.00 – $21.00 from Brownells. For long F-Class or tactical rifles, we recommend the 10″x52″ Scoped Shotgun Bag, Brownells item 132-000-003WB. You can also order direct from the Bore-Store manufacturer, Big Spring Enterprises, www.BoreStores.com. Big Spring will also craft custom sizes on request.

Consider Military-Style, Triple-Layer Bags for Long-Term Storage
While we prefer Bore-Stores for regularly-used guns, if you have heirloom firearms that will be kept in storage for very long periods without seeing any use, you may want to grease them up and place them in the thin, but rugged three-layer storage bags sold by Brownells. The bags are made from a three-layer laminate of polyester, aluminum, and polyethylene film, with a shiny silver exterior. Though the laminate is thin, the Brownells storage bags are puncture-resistant, and have a 0% moisture transmission rating so moisture can’t get inside. These bags are also resistant to petroleum-based chemicals and they won’t break down even in contact with soil or moisture.

3-layer Brownells storage bagHere’s one VITAL bit of advice for using these bags. Be absolutely sure, before you seal up the bags, that your guns are DRY and that all metal surfaces have been coated with an effective anti-corrosive, such as BoeShield T9 or Eezox. Brownells’ storage bags are inexpensive. A three-pak of 12″x 60″ rifle sacks (item 083-055-003WB) costs just $22.99 — under eight bucks a gun. That’s cheap insurance for rifles and shotguns that may cost thousands of dollars.

Get Your Guns Out of Foam-lined Cases — They Are Rust Magnets
Just about the worst thing you can do in the winter (short of leaving your rifle outside in the rain) is to store firearms in tight, foam-padded cases. The foam in these cases actually collects and retains moisture from the air, acting as the perfect breeding ground for rust.

Foam-lined hard caseRemember, those plastic-shelled cases with foam interiors are for transport, not for long-term storage. Don’t repeat the mistake of a wealthy gun collector I know. He stored four valuable Colt Single Action Army (SAA) revolvers in individual foam-padded cases, and locked these away in his gun safe. A year later, every one of his precious SAAs had rusted, some badly.

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December 12th, 2018

Multi-Gun Nationals on Shooting USA TV Tonight

USPSA Multi-Gun Championship Nevada boulder city SFC Daniel Horner
Here Todd Jarrett nails three steel targets and a pop-up orange clay bird. Watch full video below.

If you are a fan of 3-Gun competition, tune in to Shooting USA this week. The latest episode, which airs Wednesday October 4, features the 2018 USPSA Multi-Gun Nationals in Boulder City, Nevada. You can see many of the nation’s top 3-Gun shooters attacking some very challenging stages with pistols, rifles, and shotguns. CLICK HERE for TV Schedule.

USPSA Multi-Gun Nationals
Image from Sierry Whiskey Video from 2017 USPSA Multi-Gun Nationals.

Multi-gun competition has evolved considerably since it started 30 years ago. The firearms are more sophisticated, the optics are better, and the stage times are much faster. Still, the challenge remains the same: How fast can you shoot multiple targets, with the score determined by speed and accuracy? For the best in the sport, the answer is very fast indeed, but Match Director Pete Rinsing has a few tricks up his sleeve to challenge competitors on never-before-seen courses of fire at the USPSA Multi-Gun Nationals held in April 2017.

Todd Jarrett highlights from 2017 USPSA Multi-Gun Nationals. Check out 300-yard prone rifle at 00:30, and blazing rifle-pistol-shotgun transitions at 00:50:

Most people compete in the Tactical Division, including 8-time Champion, Daniel Horner. Horner rose to the rank of Sergeant First Class with the USAMU. Now a civilian, Horner currently shoots with Team SIG. Competitors in the Tactical division are not allowed a bipod, so many competitors utilize structures on the stage to stabilize their long gun. Regardless of division, the USPSA Multi-Gun Nationals is a true test of manipulating three different weapons, under pressure, on run-and-gun courses of fire. And the pressure is definitely on when a National Championship is on the line.

USPSA Multi-Gun Championship Nevada boulder city SFC Daniel Horner

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December 12th, 2018

Tuning Barrels for Enhanced Precision and Accuracy

Anschutz Tuner

When a shot is fired through it, a barrel will exhibit harmonics. Tuning these harmonics (the “waves” that propagate through the barrel) can alter point of impact and, if you’re lucky, reduce group size. Barrel tuners have been used successfully in rimfire benchrest for many years (see photo above). While there are competing theories as to how and why barrel tuners work on rimfire rifles, there is no question that the accuracy of some rimfire barrels can be improved with the addition of a tuner. By changing the position of weights at the end of the barrel, we’ve seen shooters shrink their average group size as well as adjust the “sweet spot” for different lots of rimfire ammo. On the other hand, tuners can be the source of great frustration; some installations may yield little or no benefit. A shooter may have to experiment with a variety of different tuner designs (and weights) to find the optimal configuration.

Gene Bukys Barrel Tuner 333smittyCenterfire Tuners–Still a Work in Progress
In centerfire benchrest competition, the vast majority of competitors do not use tuners, though a few short-range shooters such as Gene Bukys and Jackie Schmidt have enjoyed considerable success. Gene has won major championships with tuned rifles. In 2011 Gene won both the Super Shoot and World Benchrest Championship (WBC), and Gene recently set a new NBRSA Sporter Class Grand Agg Record.

Centerfire benchrest guns typically employ shorter barrels with a much fatter contour (larger diameter) than rimfire rifles. Because centerfire rounds produce much higher pressures and velocities that a 22LR, a centerfire barrel also exhibits much different vibration characteristics than a typical rimfire barrel. Nonetheless, there are pioneers working with centerfire tuners who believe that tuning may be the “next leap forward” in centerfire accuracy.

Shown below is a switch-barrel benchrest rifle built by Forum member Eddie W. of Texas. It features a dual-port Hall “M” action with a ShadeTree Engineering Tuner crafted by Butch Lambert. The gun is designed to take both a 6PPC barrel for group shooting and a 30BR barrel for score shooting. The gun was barreled by Wayne Shaw, and Eddie did the stock work himself. Eddie reports: “It is a very accurate rifle.”

Lambert Tuner

Will we see more tuners on centerfire rifles? Only time will tell. Some folks believe that, since one can easily adjust the loads shot by centerfire guns (by tinkering with the powder charge and seating depth), tuners have limited utility. On the other hand, tuner advocates such as Gene Beggs believe tuners can help keep your group sizes small even as conditions (temperature, humidity) change. Gene believes that, with an appropriate tuner, you can spend less time fiddling with the load specs (changing your powder charge) and instead “dial in” your sweet spot using the tuner.

Lambert Tuner

Permalink Gunsmithing, Tech Tip 2 Comments »
December 11th, 2018

Great RCBS Savings at Precision Reloading — Plus RCBS Rebate

Precision Reloading RCBS rebate december sale

Do you need a heavy-duty, single-stage press, or a high-output progressive with precise powder measure? Maybe a powder scale/dispenser is on your shopping list, or a versatile, multi-head case prep center. If you need these items, or other major reloading hardware, now is a great time to buy. Here’s the deal, right now Precision Reloading is discounting all RCBS gear in stock 10%. For example, the RockChucker Press is marked down from $154.99 to $139.99. And the ChargeMaster Lite is discounted from $239.99 to $215.99. Money saved is money earned, right?

But you must act quickly — don’t delay. This 10% Off discount program ends at 11:59 PM on Thursday, December 14, 2018. Go to PrecisionReloading.com to save now.

Huge RCBS Factory Rebates Now through December 31, 2018

In addition to Precision Reloading’s 10% SALE, you can save even more this month. RCBS is offering very significant factory rebates now through the end of 2018. On a $300 purchase you can get a big $100.00 rebate. And on a $500 purchase you can get a whopping $175.00 rebate — that equates to HUGE 35% net cost reduction, lowering the $500.00 item to just $325.00. The $175.00 you save can get you a very nice digital scale/dispenser, 4-6 boxes of bullets, or some nice, new dies. Or just use the money saved for other household holiday expenses. Submit RCBS Rebate Forms HERE.

Precision Reloading RCBS rebate december sale

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December 11th, 2018

Watch Out for Bullet Nose Contact in Short Seating Stems

Seating Stem Glen Zediker

Clearance Check — Remove the seating stem and drop a bullet into it. The farther down the ogive or nose-cone the step recess grips the bullet, the better. If it’s only pressing down against the bullet tip, a crooked seat is assured, along with inconsistent seating depth. — Glen Zediker

Some folks acquire a new seating die and then are surprised to find their hand-loads show crooked bullets and/or inconsistent seating depth. The problem could be a mis-match between the bullet and the die’s seating stem. In some case, particularly with long, streamlined bullets, the bullet tip can actually touch the bottom inside of the stem. This can cause a variety of problems, as Glen Zediker explains…

Invest in a Good Seating Die
Reloading Tip by Glen Zediker
The bullet seating operation is the “last thing” that happens and it’s also the one thing that can corrupt the care and treatment given to the quality of the loaded round prior. A sleeve-style seater, well-machined, goes a whopping long ways toward preserving alignment, and, therefore, concentricity. Also make sure that the stem in yours comes to rest well down onto the bullet ogive, and, above all else, is not contacting the bullet tip! That will wreck a round.

If you have this problem, you should contact the die maker — some will offer a different seating stem expressly designed for longer, pointier bullets. This “long bullet stem” will normally drop right into your existing die. If you plan to run long, VLD-style bullets you should request the special seating stem right from the get-go.

This tip comes from Glen’s newest book, Top-Grade Ammo, available at Midsouth Shooters Supply.

Permalink Bullets, Brass, Ammo, Reloading 1 Comment »
December 11th, 2018

Tech Tip: Shoot BR Cases with Rebated Rims in PPC Actions

PPC 6mm BR .308 bolt face Cutting Head for Rebating Rims

Butch Lambert of ShadeTree Engineering provided this tip. Butch notes that many 6 PPC benchrest group shooters also enjoy shooting in score matches. But to be really competitive in the BR for score game, that means shooting a 30 BR, which has a wider, .308-class rim (0.4728″ diameter). Likewise, if you want to compete in 600-yard registered BR events or in varmint matches, you probably want to run a bigger case, such as the 6BR, 6BRA, 6mm Dasher, or 6-6.5×47. Those cartridges also have the larger 0.4728″ rims.

PPC 6mm BR .308 bolt face Cutting Head for Rebating Rims

To convert a PPC-boltface action to shoot the bigger cases you can spend a ton of money and buy a new bolt. That can cost hundreds of dollars. The simpler solution is to turn down the diameter of the larger cases on a lathe. This is a relatively simple procedure with the right cutting tool.

Butch explains: “We’ve seen plenty of interest in rebating case rims. This lets you shoot a 30 BR in score matches using your PPC action. All you need is a new barrel. This saves buying another bolt, receiver, or rifle if you have a PPC boltface. Anyone who has access to a lathe can do this job pretty easily. Yesterday I turned 150 case in about an hour.” At right is the lathe form tool Butch uses to rebate the case rims.

Permalink Gunsmithing, Tech Tip 1 Comment »
December 10th, 2018

Bargain Finder 168: AccurateShooter’s Deals of the Week

Accurateshooter Bargain Finder Deals of Week

At the request of our readers, we provide select “Deals of the Week”. Every 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. Midsouth — Hornady Classic Press Full Reloading Kit — $249.99

hornady classic press reloading kit powder measure funnel digital scale
hornady classic press reloading kit powder measure funnel digital scale

Here’s great option for someone getting starting in hand-loading. The Hornady Lock-N-Load Classic Kit includes all the tools you need to load precision ammo (except dies). You get a high-leverage single stage press, powder measure, trickler, digital scale, reloading manual — and much more. Normally you’d pay $308.59 for this full Kit. Now it’s just $249.99 with FREE shipping for everything listed below:

Lock-N-Load Classic single-stage press
Lock-N-Load Powder Measure
Electronic Scale
Powder Trickler
Powder Funnel
Hornady Cartridge Reloading Handbook (9th Ed.)
Hand-Held Priming Tool
Primer Catcher
Three Lock-N-Load Die Bushings
Universal Reloading Block
Chamfering and Deburring Tool
One Shot Case Lube

NOTE: This Hornady Classic Kit does NOT include dies or shell-holders.

2. Bruno’s — Norma 6mm Dasher Brass (Gen 2) $114.95/100

Norma 6mm Dasher brass cartridge cases Bruno Shooters supply Bruno's

The 6mm Dasher was originally a wildcat cartridge. To make Dasher brass you had to fire-form (or hydro-form) 6mmBR brass. That all changed a couple years ago when Shiraz Balolia (of Grizzly.com) signed a deal with Norma to produce rifle-ready 6mm Dasher brass. Norma’s Dasher brass features a longer neck offering more seating flexibility (and slightly more capacity). The latest Dasher brass is very good — capable of winning benchrest matches. If you have an older Dasher chamber, just trim the necks. Thanks to Lester Bruno, Norma Dasher brass is now available again. This is premium GEN 2 Dasher brass with the standard rim thickness. We believe Bruno’s is now the exclusive supplier of Norma Dasher brass. The brass is in the USA and will ship soon. Get this Norma-made 6mm Dasher Brass while you can. Price is $114.95 per 100 pieces. Factor in the savings (in bullets, powder, and time) by avoiding fire-forming, and you see why this brass is very popular.

3. Amazon — Howard Leight NRR 30 Impact Pro Muffs

Howard Leight Impact Pro muff hearing protection earmuff Noise reduction rating NRR 30db 30 NRR

When it comes to protecting your hearing, the Noise Reduction Rating (NRR) is KEY. The higher the NRR number, the better the muffs protect your hearing from dangerous noise energy. Howard Leight’s new Impact Pro Earmuffs offer an impressive 30dB Noise Reduction Rating PLUS full electronic functionality. So you get really high-quality noise reduction PLUS the ability to hear range commands and conversations. Yes these Impact Pros are pretty big, but you won’t find better quality electronic muffs that offer a higher NRR for anywhere near the $49.99 price. These are our Editor’s Choice for indoor shooting and when we are spotting (where muff thickness is not an issue).

4. Natchez — Big Savings on Nikon Optics (Scopes, LRFs, Binocs)

Nikon natchez scope deal bargain refurbished sale discount

Need a scope or LRF for hunting season? Here’s a chance to save hundreds on a quality Nikon optic. Natchez Shooters Supply is offering exclusive deals on both new and refurbished Nikon riflescopes, rangefinders, and binoculars including camo finish hunting scopes for hunters. There are some truly excellent bargains, plus you can get $5 Flat Rate Shipping with Code 180910 (through 9/12/18). Here are some of the best deals on Nikon scopes at Natchez right now:

Nikon 2-10x50mm Monarch 5 scope (new), BDC Reticle
Now $319.99 (Reduced from $599.95 — Save $279.96)

Nikon 3.5-14x50mm ProStaff 5 scope (new), Illum. Nikoplex Reticle
Now $294.98 (Reduced from $579.95 — Save $284.97)

Nikon 4-12x40mm Active Target scope (new) , Realtree Camo, BDC Predator Reticle
Now $184.99 (Reduced from $329.95 — Save $144.96)

5. Optics Planet — NcStar Vism Shooting Mat, $21.25

Shooting Mat

Still laying on the ground or using your wife’s yoga mat for shooting? For $21.25 now you can grab this NcStar Vism shooting mat and give your knees, belly, and elbows a break from the ground below. It opens wide and even has straps for pre-loading your bipod. This is a quality pad that helps put some space between you and your rocky position. When you’re done simply fold in the edges, roll it up and it takes up the same or less space as a sleeping bag. This is a good product tested and used by our staff.

6. Midsouth — New Lyman Reloading Presses on Sale

Lyman Ideal c-frame turret reloading press sale discount Midsouth

Midsouth Shooters Supply is running a big sale right on Lyman’s impressive new Brass Smith line of reloading presses. There are three models, each offering great performance and value for its class. You can save quite a bit of cash with this Midsouth Lyman Press sale. If you haven’t tried orange yet, we think you’ll be impressed. The little C-Frame is a steal at $69.99. The sturdy O-Frame Singles stage press is $154.99. And if you’re looking for a Turret press, the new 8-station Lyman Turret press ($192.99 on sale) is very impressive — with more stations than the competition, and enhanced strength/rigidity.

7. CDNN — Ruger EC9S Carry Pistol, $229.99

Ruger Carry Concealed handgun pistol sale bargain EC9S 9mm

Here’s a good little 9mm carry pistol for a crazy-low price. Right now, CDNN is selling the popular Ruger EC9S 9MM pistol for $229.99 — that’s $70 off the regular $299.00 price. This gun is light (17.2 ounces) and thin so it’s easy to carry discretely. The EC9S is 6″ overall with a 3.12″-long barrel. The EC9S features integral sights and ships with a single 7-round magazine.

8. GunBuyer — Mossberg 12ga Tactical Shotgun, $299.00

Mossberg model 500 20

A strong argument can be made that the best home defense firearm is a 12 gauge shotgun. This Mossberg 500 is a reliable 12ga pump-gun with useful upgrades including ghost-ring sights and barrel heat-shield. This Model 500 Tactical boasts an 8-shell capacity and weighs 7 pounds unloaded. Order now from GunBuyer.com for $299.00. Owners love this serious-looking shotgun: “This unit… fires smooth, and operates perfectly out of the box. There’s an odd beauty to the tactical pump that is hard to describe. The action is smooth and repeatable.”

9. Amazon — 12″x12″ Splatter Grid Targets, 10 for $9.99

Sight-in 12

This 12″x12″ Splatterburst Target combines splatter shot marking with a grid background, with five aiming points. The bright neon shot circles make it easy to see your shots. And the handy grid lets you quickly estimate your group size. Get a 10-pack for $9.99, or a 25-pack for $17.99 (better deal). This particular target has earned rave reviews — 87% of verified buyers gave this a FIVE-Star rating. One example: “Excellent quality and durability. The adhesive is really strong. High contrast makes down range targeting easy and the splatter contrast is [great].”

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December 10th, 2018

Powder Moisture Content — What You Need To Know

vihtavuori vv moisture content powder propellent
This Technical Report Comes from the Vihtavuori website.

Powder Moisture Content — Did You Know?
Variations in moisture content change the burning rate of a powder and thereby chamber pressures and muzzle velocity. The moisture content of the Vihtavuori N100 and N300 series powders is usually around 1%, while the N500-series’ normal moisture content is 0.6% because of the added nitroglycerine.

So what difference does moisture content make? Here’s an example. In a test, a [Vihtavuori] powder sample was dried by heating it, losing about 0.5 % of its weight. Cartridges were then loaded with the dried powder and fired using a pressure gun. Chamber pressures and muzzle velocities produced by these special cartridges were compared to those produced by cartridges loaded with untreated powder. (The powder charge and bullet were of course the same in both sets of cartridges.)

After Powder Drying:
Pressure Increased 11% from 320 MPa to 355 MPa
Velocity Increased 2.6% from 2526 to 2592 FPS

Comparing results showed chamber pressures increased from 320 MPa to 355 MPa with the dried powder, and the muzzle velocity increased accordingly from 770 m/s to 790 m/s (2526 to 2592 FPS). And note, this is only one example, of one caliber and loading. The difference might be much higher depending on the cartridge and loading combinations.

Recommendation: Store powder below 68°F in 55-65% humidity.

What does this tell us? Well, it seems we need to forget the old saying “Keep your powder dry”! Instead, focus on proper powder storage, at a temperature below 20°C/68°F and humidity between 55 and 65%. Safe reloading everybody!

vihtavuori vv moisture content powder propellent

Tech Tip sourced by EdLongrange. We welcome reader submissions.
Permalink Bullets, Brass, Ammo, Reloading 1 Comment »
December 10th, 2018

Gun Digest Bullet Selection Book Is Valuable Resource

Massaro Bullet Selection book gun digest

Want to know how bonded hunting bullets are made, or why plastic tips make varmint bullets more “explosive”? Do you need help selecting a projectile for your next Elk hunt? Then you may want to pick up a copy of Understanding Ballistics: Complete Guide to Bullet Selection by Philip Massaro. Released in 2015, this 272-page Gun Digest reference book covers bullets for hunting, competition, target shooting, and self-defense. Both print (paperback) and digital (Kindle) versions are available.

This handy guide includes detailed reviews of a vast variety of bullets in both factory-loaded and component form. The book covers all types of projectiles — solids, hard-cast, tipped, bonded, FMJ, round-nose, soft-tip, composite, jacketed, hollowpoint and more. Massaro help you pick the best bullets for everything from self-defense pistols to dangerous game rifles (and everything in between). There is extensive coverage of rimfire ammo and bullets. Notably, Massaro gives detailed descriptions of most of the popular bullets on the market today. He explains how they are designed and constructed, and how they will perform when they impact the intended target. Fully illustrated with hundreds of black/white images, this book is truly an “Encyclopedia of projectiles”. Massaro covers a host of bullet options, including more caliber/bullet combinations than any other comparable book on the subject.

FREE Preview on Amazon.com
You can PREVIEW this book on Amazon.com. Go to the Book Listing Page then click on “Look Inside” right above the cover photo. That will let you see about 30 pages from the book, including dozens of illustrations. Here is the Table of Contents:

Massaro Bullet Selection book gun digest

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