September 16th, 2016

Vihtavuori Powders Loading Information Online

vihtavuori reloading guide
Click image for Online Reloading Data. CLICK HERE for Printable PDF Reloading Guide.

Vihtavuori has updated and enhanced its reloading information, adding VV powder load recipes for many more cartridge types. Data is now online for 64 rifle cartridge types and 26 pistol cartridge types. You’ll find the updated reloading data on the Vihtavuori Website. Bookmark this link:

The updated online information supplements the Vihtavuori Reloading Guide (2016 Edition) available in PDF format. The online Reloading Database has dedicated sections for Rifle Cartridges, Pistol Cartridges, and Cowboy Action. There is also a handy, FREE Reload Mobile App for iOS and Android.

Rifle Reload DATA | Handgun Reload DATA| Mobile Reload App

vihtavuori reloading guide

Rifle Reloading Data

Vihtavuori’s Rifle Reloading Database is now very comprehensive. Many of the popular modern match cartridges such as the 6.5×47 Lapua and 6.5 Creedmoor are now included, and of course you’ll find the 6mm PPC, 6mmBR, and 6XC. (There is no .284 Win or 7mm RSAUM data unfortunately.) You will find recommended load recipes for all the following cartridges:

.204 Ruger
.221 Remington Fireball
.222 Remington
.22 Hornet
.223 Remington
.22-250 Remington
.223 WSSM
.243 Winchester
.243 WSSM
6mmBR Norma
6 XC
6mm Remington
.240 Weatherby Magnum
6.5 Grendel
6.5 x 47 Lapua
6.5 Creedmoor
6,5 x 55 Swedish Mauser
6,5 x 55 Swedish Mauser/ SKAN
6.5-284 Norma
.25-06 Remington
.260 Remington
.270 Winchester
.270 WSM
.270 Weatherby Magnum
7 mm-08 Remington
7 x 57
7 x 64
7 mm Remington Magnum
7 mm WSM
7 mm RUM

7 x 57R
7 mm Weatherby Magnum
7,5 x 55 Swiss GP31
.30 Carbine
.30-30 Winchester
.300 AAC Blackout
7,62 x 39
.300 Savage
7,62 x 53R (7,62 Russian)
.308 Winchester
.30-06 Springfield
.300 Lapua Magnum
.300 Remington Ultra Magnum
.300 Winchester Magnum
.300 Weatherby Magnum
.30-.378 Weatherby Magnum
.300 H&H Magnum
.300 WSM
.303 British
8 x 57 IRS
8 x 57 IS (8 mm Mauser)
.338 Winchester Magnum
.338 Lapua Magnum
9,3 x 62
9,3 x 66 Sako
9,3 x 74R
.375 H&H Magnum
.416 Rigby
.444 Marlin
.45-70 Government
.458 Winchester Magnum
.50 Browning

Handgun Reloading Data

Likewise, VV’s Handgun Reloading Database is extensive. These pistol cartridges are covered:

.32 S&W Long N.P.
.32 S&W Long Wadcutter
.357 Remington Maximum
.357 Magnum
.357 SIG
.38 Super Lapua
.38 Super Auto
.38 Special
7 mm GJW
7 mm TCU
7 mm BR Remington
7,62 x 25 Tokarev
9 mm Luger

9 x 21
9 x 23 Winchester
.40 S&W
10 mm AUTO
.41 Remington Magnum
.44 S&W Special
.44 Remington Magnum
.45 ACP
.45 Colt
.45 Winchester Magnum
.454 Casull
.500 S&W Magnum
.50 AE

Story Tip by EdLongrange. We welcome reader submissions.
Permalink Bullets, Brass, Ammo, Reloading 1 Comment »
September 1st, 2016

Humidity and Powder Burn Rates — What You Need to Konw

Tech Tip Norma Powder gunpowder moisture temperature humidity

Most shooters realize that significant changes in temperature will alter how powders perform. That’s why you want to keep your loaded ammo out of the hot sun, and keep rounds out of a hot chamber until you’re ready to fire. But there are other factors to be considered — HUMIDITY for one. This article explains why and how humidity can affect powder burn rates and performance.

We’ve all heard the old adage: “Keep your powder dry”. Well, tests by Norma have demonstrated that even normal environmental differences in humidity can affect the way powders burn, at least over the long term. In the Norma Reloading Manual, Sven-Eric Johansson, head of ballistics at Nexplo/Bofors, presents a very important discussion of water vapor absorption by powder. Johansson demonstrates that the same powder will burn at different rates depending on water content.

Powders Leave the Factory with 0.5 to 1.0% Water Content
Johansson explains that, as manufactured, most powders contain 0.5 to 1% of water by weight. (The relative humidity is “equilibrated” at 40-50% during the manufacturing process to maintain this 0.5-1% moisture content). Importantly, Johansson notes that powder exposed to moist air for a long time will absorb water, causing it to burn at a slower rate. On the other hand, long-term storage in a very dry environment reduces powder moisture content, so the powder burns at a faster rate. In addition, Johansson found that single-base powders are MORE sensitive to relative humidity than are double-base powders (which contain nitroglycerine).

Tests Show Burn Rates Vary with Water Content
In his review of the Norma Manual, Fred Barker notes: “Johansson gives twelve (eye-opening) plots of the velocities and pressures obtained on firing several popular cartridges with dehydrated, normal and hydrated Norma powders (from #200 to MRP). He also gives results on loaded .30-06 and .38 Special cartridges stored for 663 to 683 days in relative humidities of 20% and 86%. So Johansson’s advice is to keep powders tightly capped in their factory containers, and to minimize their exposure to dry or humid air.”

Confirming Johansson’s findings that storage conditions can alter burn rates, Barker observes: “I have about 10 pounds of WWII 4831 powder that has been stored in dry (about 20% RH) Colorado air for more than 60 years. It now burns about like IMR 3031.”

What does this teach us? First, all powders start out with a small, but chemically important, amount of water content. Second, a powder’s water content can change over time, depending on where and how the powder is stored. Third, the water content of your powder DOES make a difference in how it burns, particularly for single-base powders. For example, over a period of time, a powder used (and then recapped) in the hot, dry Southwest will probably behave differently than the same powder used in the humid Southeast.

Reloaders are advised to keep these things in mind. If you want to maintain your powders’ “as manufactured” burn rate, it is wise to head Johannson’s recommendation to keep your powders tightly capped when you’re not actually dispensing charges and avoid exposing your powder to very dry or very humid conditions. The Norma Reloading Manual is available from

Real-World Example — “Dry” H4831sc Runs Hotter

Robert Whitley agrees that the burn rate of the powder varies with the humidity it absorbs. Robert writes: “I had an 8-lb. jug of H4831SC I kept in my detached garage (it can be humid there). 43.5-44.0 gr of this was superbly accurate with the 115 Bergers out of my 6mm Super X. I got tired of bringing it in and out of the garage to my house for reloading so I brought and kept the jug in my reloading room (a dehumidified room in my house) and after a few weeks I loaded up 43.5 gr, went to a match and it shot awful. I could not figure out what was going on until I put that load back over the chronograph and figured out it was going a good bit faster than before and the load was out of the “sweet spot” (42.5 – 43.0 gr was the max I could load and keep it accurate when it was stored in less humid air). I put the jug back in the garage for a few weeks and I now am back to loading 43.5 – 44.0 gr and it shoots great again. I have seen this with other powders too.”

If you have two jugs of the same powder, one kept in a room in your house and one somewhere else where it is drier or more humid, don’t expect the two jugs of the same lot of powder to chrono the same with the same charge weights unless and until they are both stored long enough in the same place to equalize again.

Permalink - Articles, Reloading No Comments »
April 22nd, 2016

IMR® Powders introduces IMR 4955 Enduron Powder

Hodgdon IMR Enduron 4955 temperature stable powder reduced fouling

In 2015, IMR® Powder introduced a new line of powders with Enduron® Technology. These powders are designed to address several performance gaps as powder technology has advanced. Here are key features of the Enduron line of propellants:

  • Enduron powders contain an additive that drastically reduces copper fouling in the gun barrel. Copper fouling should be minimal, allowing shooters to spend more time shooting and less time cleaning a rifle to retain accuracy.
  • The new Enduron line is insensitive to temperature changes. Whether a rifle is sighted in during the heat of summer, hunted in a November snowstorm or hunting multiple locations with drastic temperature swings, point of impact with ammunition loaded with Enduron technology will be very consistent.
  • Enduron powders provide optimal load density, assisting in maintaining low standard deviations in velocity and pressure, a key feature for top accuracy.
  • Enduron technology is environmentally friendly, crafted using raw materials that are not harmful to the environment.

Hodgdon IMR Enduron 4955 temperature stable powder reduced fouling

New IMR 4955 for Larger Cartridges
For 2016, IMR has introduced IMR 4955, a new Enduron extruded powder that is a top performer with popular cartridges such as 270 Winchester, 25-06 Remington, 280 Remington, 300 Winchester Magnum and many more. This new powder falls directly between the new IMR 4451 and IMR 7977 in burn speed, providing excellent performance for most big-game cartridges. Like all Enduron Technology powders, IMR 4955 is temperature insensitive, as shown below.

Hodgdon IMR Enduron 4955 temperature stable powder reduced fouling

Adding this propellant to the Enduron line filled in an important place on reloading benches. IMR 4955, plus the original three Enduron powders, provide excellent loading solutions for cartridges from 223 Remington to the massive 500 Nitro Express Magnum. Further, in these days of powder shortages, these new Enduron powders can fill a gap by providing comparable performance to select Hodgdon® powders. Specifically, IMR 4955 is a great choice for cartridges that work well with Hodgdon H4831.

Hodgdon IMR Enduron 4955 temperature stable powder reduced fouling

IMR Enduron 4955 is available in one-pound (1 lb.) and eight-pound (8 lb.) containers from quality reloading retailers.

Permalink New Product, Reloading No Comments »
January 17th, 2016

New Vihtavouri Reload App for Mobile Devices

Vihtavuori RELOAD Android iOS Apple iphone smartphone App Application Play Store

Are you a 6 PPC shooter who relies on Vihtavuori N133? Or maybe you’re a .45 ACP Bullseye shooter who uses N310 or N320. Or perhaps you favor N150 in your 6mmBR or .308 Winchester. If you are a Vihtavuori powder user (or are considering trying these fine Finnish powders), then check out Vihtavuori’s new FREE mobile App.

The new Vihtavuori Reload App lets you keep track of your favorite reloading recipes, and manage load development. You can log load recipes for as many firearms and cartridge types as you want. The App holds all relevant data — cartridge class, bullet, loads specs. The Vihtavuori Reload App also provides instant access to the latest Vihtavuori Reloading Data as well as other Vihtavuori information. If you want hard copy of your load recipes, just email the recipe(s) to your personal e-mail account and then you can print out the info with a networked printer.

Download for iOS from Apple App Store | Download for Android from Google Play Store

Vihtavuori RELOAD Android iOS Apple iphone smartphone App Application Play Store

For over 90 years, Vihtavuori has been known for producing high-quality propellants with reliable ballistic performance, long shelf-Life, and a wide selection of burn rates. Vihtavuori powders are manufactured to very high standards, and many world records have been set with Vihtavuori propellants. For more information, visit

Permalink New Product, Reloading 1 Comment »
September 25th, 2015

Powder Valley Now Carries Czech-Made Shooters World Powders

Shooters World Powder Valley Lovex Powder Explosia Czech Republic Reloading Guide

Powder Valley Inc. (PVI) is now carrying Shooters World-branded powders produced by the Czech enterprise Explosia A.S., which has produced propellants since 1920. Powder Valley will initially be offering four new Shooters World propellants: Clean Shot, Heavy Pistol, Match Rifle, and Blackout. These are canister-packaged forms of the popular Lovex propellants sold in Europe. These powders are very affordable — they cost just $19.95 per pound at PVI. For other pricing and ordering information go to Match Rifle, Blackout, and Clean Shot are all currently in stock at PVI.

Shooters World says: “We have received nothing but praise about the quality of these [Lovex] propellants. Because of this, we are very confident in how our canister propellants will fare in the reloading market. We have had many competitive shooters using our product[.]”

Shooters World Reloading Guide (SAAMI) | Lovex Reloading Guide (CIP) | Burn Rate Chart

The following descriptions of Shooters World propellants have been provided by the manufacturer. Since has not tested any of these powders yet, we cannot verify any particular claims:

Shooters World Powders — Manufacturer’s Product Descriptions

Match Rifle propellant is our canister form of Lovex D0 73-06 propellant. It is similar in burn speed to Accurate® 2520 and CFE™223. It holds the broadest utility across all moderate rifle propellants. The propellant gas generation rate is appropriate for cartridges of the light to heavy sectional density .223 Remington and .308 Winchester. It can load the 55 grain .223 Rem, as well as the 77 grain .223 Rem. It loads the 150, 168, and 175 grain .308 Winchester, and loads all .30-30 combinations. It works in .30-06, in 7mm-08, and even in the .22-250.

Blackout propellant is our canister form of Lovex D063-02 reloading propellant. It is slightly slower in burn speed than Accurate 1680®. The propellant gas generation rate is superior for subsonic 300 Blackout, 7.62×39, and some straight-walled rifle cartridges, where rapid transformation from powder to gas is desired. You would be hard pressed to find a subsonic 300 Blackout propellant that will give you the cycling reliability of the Shooters World Blackout.

Shooters World Powder Valley Lovex Powder Explosia Czech Republic Reloading Guide

Clean Shot propellant is the canister form of Lovex D0 32-03 propellant. Ballistic results for this propellant show it to be highly versatile, with low residue in a myriad of pistol cartridges. The burn rate is similar to Accurate No. 2®. Additionally, we have tested this propellant in shot shell, and found it to be exceptionally clean and consistent in velocity. This propellant can be used in virtually all pistol cartridges. A spherical propellant, it meters through charge plates extremely consistently and will work with a high-speed loader with very good flow. This propellant contains flash suppressant and is optimized for .45 ACP, 38 SPL, some standard velocity 9mm, some .40 S&W applications, reduced loads in .357 magnum, .44 magnum, and others.

Heavy Pistol propellant is our canister form of Lovex D0 37-02 propellant. It is similar in burn speed to Accurate® No. 9. The gas generation rate is appropriate for cartridges of the magnum pistol family and the .300 AAC Blackout, supersonic with light bullets. It does contain a level of flash suppression, incorporated into the propellant. A spherical propellant, it meters through charge plates consistently and will work with high-speed loaders with very good flow. This propellant is bracketed on the fast side by D0-37-01 (similar to Accurate® No 7), and on the slow side by D0-63-02 (similar in burn speed to Accurate® 1680).

CLICK HERE for Complete Explosia S.A. Catalog with many more powders.

Technical Information — CIP vs. SAAMI
Shooters World is in the process of developing reloading data based on SAAMI/ANSI standards. This data will be published on the Shooters World website, as it is generated and proofed in SAAMI test barrels, and compared against SAAMI reference ammunition. Hand-loaders can also reference information in the Lovex Reloading Guide, which has data tested to CIP (Commission Internationale Permanente) standards.

Shooters World Powder Valley Lovex Powder Explosia Czech Republic Reloading GuideNote that Shooters World has maintained the nomenclature of the Lovex propellants on its reloading canister bottles. Shooters World did this to ensure that reloaders would have maximum access to reloading data — both from European and American standards. Shooters World says: “The charge weights and pressures reported in the Lovex Reloading Guide have been found very reliable”.

The main difference between CIP data and SAAMI standardization has to do with barrel length. CIP barrel length standards and SAAMI barrel length standards do not necessarily correspond. Therefore, the velocities reported in the Lovex Reloading Guide may not directly relate to USA standards. As is always the case, any reloader should start the load development process at a safe “starting charge”, and slowly increase charge weights to desired performance levels. Never exceed a maximum published load.

Permalink New Product, Reloading No Comments »
May 17th, 2015

NEW! Noble Sport VECTAN Powders Now at

Noble Sport Vectan gunpowder propellant stick powder tubal powder

Shooters rejoice — we now have new propellant options for rifles, pistols, and shotguns. Noble Sport is now importing its VECTAN series of powders, which are available now at What’s even nicer, the VECTAN bottles contain 1.1 pounds of powder, so you get a little extra for your money (compared to traditional 1-pound containers). Check the VECTAN Reloading Data Page to see what Nobel Sport powders best suit your needs.

Noble Sport Vectan gunpowder propellant stick powder tubal powder

CLICK Here for VECTAN Load Data and Burn Rate Chart (PDF)


Permalink New Product, Reloading 2 Comments »
March 12th, 2015

Precision Reloading Has Popular Powders in Stock Now

precision reloading powder in-stock Hodgdon IMR Norma Alliant

Looking for powder? Precision Reloading just received a pretty large shipment of Hodgdon, IMR, and Winchester Powders. This vendor also has popular Accurate, Alliant, Norma, and Vihtavuori Powders in stock. Sorry, no Varget or H4350 arrived, but Precision Reloading does have many popular propellants now. Powders currently IN STOCK at Precision Reloading (as of 9:00 am, 3/12/2015):

Hodgdon: H4831sc, H4831, H4198, H414, H335, H380, Hybrid 100V, H50BMG, Titegroup, 800X, Superformance, LeveRevolution (and others).
IMR: 4166 (New Enduron), 4227, 4320, 4350, 4451 (New Enduron), 4895, 7828SSC,
Alliant: RL33, RL50, 4000MR, PowerPro Varmint
Norma: 200, 201, 202, 203B (like RL15), 204, MRP, URP
Accurate: 4064, 4350, 5744, Magpro
Vihtavuori: N133, N135, N160, N340, 20N29

Reloading tip: If you currently use Alliant Reloder 15, Norma 203 B is very, very close. It is made by the same manufacturer, in the same plant, with the same burn rate and kernel size. Of course, for safety, you should still start low and work up your load incrementally.

Permalink Reloading No Comments »
February 21st, 2015

Rick Jensen Temp-Tests New IMR 4451

Hodgdon H4350 IMR 4451 temperature powder test

Rick Jensen, Captain of the U.S. F-Open Rifle Team, recently tested some of the new IMR 4451 powder. Rick and other team members were looking for a good powder that could replace Hodgdon 4350 which is difficult to obtain currently. The makers of IMR 4451 claim that it is not sensitive to temperature and that it delivers competitive accuracy. So far, Rick’s tests, done with a .284 Winchester and 180gr Berger Hybrids, appear to confirm those claims. Rick posts:

“I did a little informal powder comparison of H4350 versus the new IMR 4451. Rifle used was a Kelbly Panda with a 30″, 1:8.75″ twist 5R Bartlein barrel [chambered in .284 Win]. All charge weights were 50.0 grains using CCI BR2 primers. I was very impressed with this new powder and I believe it to be equal to H4350 as far as temperature sensitivity.

I did not test for accuracy but I will tell you my groups were pretty much equal between the two and all were in the .2-.3 MOA range. I will defiantly be shooting more of this powder in the weeks to come, assuming the supply chain will allow. It looks very encouraging to finally have a alternative to H4350 that we might actually be able to buy.”

Hodgdon H4350 IMR 4451 temperature powder test

Chronograph Results with Temps from 23° F to 101°
Here are chronograph results of a comparison test between IMR 4451 and H4350. Rick’s rifle was cleaned and allowed to cool between each test. Five fouling shots were fired before each test. Important: Note that for both Test #1 and Test #2, the powder order is reversed in the mid-temp fields (IMR 4451 first, then H4350). For the low and high temp entries, H4350 is listed first.

Hodgdon H4350 IMR 4451 temperature powder test

Here are the IMR 4451 fired cases, displayed Left to right, coldest to the hottest (in terms of case temp when fired). All charge weights were the same: 50.0 grains.

Hodgdon H4350 IMR 4451 temperature powder test

Permalink Bullets, Brass, Ammo, Reloading 15 Comments »
January 15th, 2015

Load Data for Accurate LT-30 and LT-32 Powders

Western Powders LT-32 LT-30 accurate powder

Is that target good enough? Yes that’s really five (5) shots. This amazing group was shot, in competition, with 6 PPC cartridges loaded with Accurate LT-32 powder. If you’d like to try out this powder in your rifle, Western Powders has released loading data for the LT series of powders. LT-32 is a good choice if you’re currently using propellants with burn rates similar to Vihtavuori N133 or Hodgdon Benchmark powders. (Caution: NEVER simply substitute loads powder for powder. Always start low and work up when trying a new powder). The other powder in Accurate’s LT series, LT-30, has a burn rate similar to Hodgdon H4198. LT-30 is a superb performer in the 30 BR cartridge. LT-30 also is a good choice for small varmint cartridges such as the 17 Rem Fireball.

Western Powders LT-32 LT-30 accurate powder

benchrest 30 BR rem remington lt-32 powder Western

Download FREE Reloading Guide for Accurate and Ramshot Powders
You can also download the complete Western Powders Reloading Guide in PDF format. This covers Accurate and Ramshot propellants.

Western Powders LT-32 LT-30 accurate powder

Permalink Bullets, Brass, Ammo, Reloading 4 Comments »
October 21st, 2014

IMR Introduces New Enduron Powders: 4166, 4451, 7977

IMR Hodgdon Enduron PowderIMR is bringing out a new series of advanced-formulation extruded powders. In 2015, IMR will introduce three (3) new Enduron powders: IMR 4166, IMR 4451, and IMR 7977. The new line of IMR Enduron powders feature small kernels for easy metering, plus a built-in copper fouling eliminator. IMR claims that Enduron powders are not sensitive to temperature changes. If this is true, these powders should prove popular, particularly IMR 4166 which seems to be in the Varget/Reloder 15 burn-rate range. With Varget so hard to find, if IMR 4166 proves accurate (and available) we might see many .308 Win shooters make the switch. IMR states that IMR 4166 is a “versatile, match grade propellant”. We’ve been quite pleased with IMR 8208 XBR as a Varget alternative. IMR 8208 XBR is accurate, clean-burning, and offers good velocity. Perhaps the new IMR 4166 will be as good or better.

When will Enduron powders appear on dealers’ shelves? Hodgdon Powder Co., distributors of Hodgdon, IMR, and Winchester powders, says that: “The new IMR Enduron™ Technology powders will be available at dealers in early 2015 in 1-pound and 8-pound containers.” For more information and Enduron LOAD DATA visit or check the 2015 Hodgdon Annual Manual.

IMR’s press release provides these descriptions of the new Enduron propellants:

IMR 4166 is the first in the series of Enduron™ propellants. It’s a perfect burn speed for cartridges like the 308 Win/7.62mm NATO, 22-250 Remington, 257 Roberts and dozens more.

IMR 4451 Another new Enduron powder that gives top performance in the venerable .30-06, 270 Winchester, and 300 Winchester Short Magnum, to name just a few. This propellant is ideally suited for many mid-range burn speed cartridges.

IMR 7977 is the slowest burn rate Enduron Technology powder. It is a true magnum cartridge propellant with outstanding performance in such cartridges as the .300 Winchester Magnum, 7mm Remington Magnum, .338 Lapua and more.

IMR Hodgdon Enduron Powder

Permalink New Product, Reloading 21 Comments »
January 20th, 2014

Nammo Announces Acquisition of Vihtavuori

Nammo Lapua acquires VihtavuoriIt’s official. Representatives of Lapua announced at SHOT Show 2014 that Nammo has purchased Vihtavuori, acquiring the “VV” line of propellants, and, most importantly, taking over Vihtavuori’s powder production facility in Vihtavuori, Finland.

This means that Vihtavuori is now officially under the Nammo umbrella as is Lapua, producer of brass, bullets, and loaded ammunition. Lapua engineer Tommi Tuuri has visited the Vihtavuori plant in person. Tommi says all operations are going well and the plant is running at normal capacity (but Nammo does plan some upgrades in the months ahead). Vihtavuori powders will continue to be imported into the United States as before and the powders will be made available through existing distribution channels.

Learn More about Nammo Purchase of Vihtavuori Powder Factory

The Vihtavuori Powder factory is located in Vihtavuori, Finland. Click marker to zoom.

View Larger Map

Permalink - Videos, News 1 Comment »
September 16th, 2013

Loading for a 16″ Naval Gun? Try these Really Big Powder Sticks…

Story by Boyd Allen
While many top competitive shooters trickle their stick powder charges to a kernel or two, that would be impractical when loading charges for giant naval guns. You may be surprised, but the shells fired by the U.S. Navy’s massive 14″ and 16″ naval guns were also propelled by stick-type extruded powders. You couldn’t trickle these ‘kernels’ though — a single stick or ‘grain’ can be over 2″ long. Take a look…

DuPont artillery naval powder cannon gun kernel propellant stick

In connection with a Benchrest Central discussion that drifted to the subject of powders used in large naval guns, I heard from Joe McNeil, whose father was involved in manufacturing those very propellants as a DuPont employee. Joe writes:

“My Dad worked for the DuPont company for over 40 years. Every time the nation went to war he was assigned to the gun powder plants which DuPont ran for the government for $1.00 per year! His last assignment was at the Indiana Ordnance Plant in Jefferson, Indiana from 1952 through 1958. He had a display case made of all of the different powders made at the plant and left it to me. That’s why I have a grain of 16″ gun powder. He took me out to the Jefferson proving grounds once when they tested the powder in a 16″ gun. We watched from a half-mile away but it left a lasting impression when they fired that gun. They actually had a set of rings they fired through to test the performance of the powder and shell. This was a truly fond memory of my Dad and his work.”

Here are some pictures of the gun powder “grains” made during the Korean War at the Indiana Ordnance Works where Joe McNeil’s father worked.

DuPont artillery naval powder cannon gun kernel propellant stick

DuPont artillery naval powder cannon gun kernel propellant stick

Above is the display case with the different powders manufactured at the DuPont plant. They include: 37 MM/AA, 75MM Pack Howitzer, 50 Cal. 5010, 20 MM 4831, 30 Cal. 4895, 76 MM, 3″, 5″, 90 MM, 4.7″, 240MM, 8″, 280 MM, 175 MM, 155 MM Howitzer, 155 MM Gun M.P., 8″ Gun M.P., 12″, 14, 16″. There are different-sized ‘grains’ for specific rounds.

Permalink Bullets, Brass, Ammo, Reloading 4 Comments »
April 20th, 2013

Online Vendors Report Recent Powder Shipments

Reloading powder propellant Alliant Vihtavuori HodgdonHere’s good news for reloaders. Some large shipments of propellants were delivered in the last week, and we are starting to see supplies of some popular powders start to catch up to demand. Third Generation Shooting Supply received a very large order of Alliant Powders in one-pound containers, including the popular Reloder series. If you need RL15, RL19 or RL22 you may be able to grab some before it’s gone. TGSS has already sold nearly a ton of RL15 this week.

Natchez Shooters Supplies is featuring Vihtavuori powders, and the Natchez inventory system is showing supplies “in stock” for many of the most popular Vihtavuori powders including N320, N133, N135, N540, N150, N160, and N165. All these powders (including 8-lb jugs of N133) are shown “in stock” as of this morning, but we caution that things change quickly!

NOTE FOR LATE READERS: Inventory shown for 10:00 AM April 20, 2013.

Powder Valley Inc.
Partial List of In-Stock Powders
Hodgon H380 (1 lb.) — In stock at $18.35/lb
Hodgdon H1000 (8 lbs.) — In stock at $152.00 for 8 lbs.
Hodgdon Retumbo (1 lb.) — In stock at $21.35/lb
Hodgdon Superformance (8 lbs.) — In stock at $152.00 for 8 lbs.
Alliant Reloder 50 (1 lb.) — In stock at $19.15/lb
Alliant Reloder 50 (8 lbs.) — In stock at $137.50 for 8 lbs.
IMR 7828 (8 lbs.) — In stock at $147.80 for 8 lbs.
Norma 203B (1 lb) — In stock at $24.80/lb (this is nearly identical to Reloder 15)
Vihtavuori 3N37 (1 lb) — In stock at $29.95/lb
Vihtavuori N150 (1 lb) — In stock at $29.15/lb
Vihtavuori N160 (1 lb) — In stock at $29.15/lb

Third Generation Shooting Supply
Alliant Powders (Partial list)
Power Pro 4000 MR (1 lb.) — 961 lbs. in stock at $19.99/lb
Power Pro Varmint – (1 lb.) — 133 lbs. in stock at $19.99/lb
Reloder 10X – (1 lb.) — out of stock
Reloder 15 (1 lb.) — 733 lbs. in stock at $20.99/lb
Reloder 17 (1 lb.) — out of stock
Reloder 19 (1 lb.) — 2579 lbs. in stock at $20.99/lb
Reloder 22 (1 lb.) — 1797 lbs. in stock at $20.99/lb
Reloder 25 (1 lb.) — 109 lbs. in stock at $20.99/lb
Reloder 50 (1 lb.) — 36 lbs. in stock at $20.99/lb

Natchez Shooters Supplies
Vihtavuori Powders (Quantities Limited)
Vihtavuori Oy N3N37 (1 lb.) — In Stock at $31.49/lb
Vihtavuori Oy N320 (1 lb.) — In Stock at $31.49/lb
Vihtavuori Oy N133 (8 lbs.) — In Stock at $197.49 for 8 lbs
Vihtavuori Oy N133 (1 lb.) — In Stock at $30.49/lb
Vihtavuori Oy N135 (1 lb.) — In Stock at $30.49/lb
Vihtavuori Oy N150 (1 lb.) — In Stock at $30.49/lb
Vihtavuori Oy N160 (1 lb.) — In Stock at $30.49/lb
Vihtavuori Oy N165 (1 lb.) — In Stock at $30.49/lb
Vihtavuori Oy N540 (1 lb.) — In Stock at $34.99/lb

Editor’s Note: As with all inventory systems, there can be a variance between actual inventories and listed inventories. We are reporting what is shown “in-stock” this morning. But if the inventories are not updated in “real time” as shipments are made, true supplies may be less than what is shown.

Permalink Bullets, Brass, Ammo, News 1 Comment »
April 1st, 2012

Powder Kernel Uniforming for Ultimate Long-Range Accuracy

MFR ScaleSuccessful long-range shooters know that careful weighing of powder charges helps them achieve superior long-range accuracy. By maintaining powder charges within very narrow weight tolerances, hand-loaders can produce ammo with more consistent muzzle velocities from shot to shot. Low Extreme Spread (ES) and Standard Deviation (SD) numbers translate directly to reduced vertical dispersion at very long ranges (although velocity is not the only contributing factor to vertical spread). In pursuit of load weight uniformity, many of our top long-range aces have invested in the latest, high-tech magnetic force restoration (MFR) digital scales (such as the Sartorius GD503). These laboratory-grade MFR scales are extremely stable (with minimal drift) and they can reliably measure to .005 grain, that is five thousandths of a grain. That is less than the weight of one kernel of typical extruded powder. For example, with Varget, there are three to four kernels in one-tenth of one grain of Varget. That means each kernel weighs .025 to .035 grains.

With the capability of modern modern MFR scales to measure less than one-hundreth of a grain, we have a new frontier in precision reloading. You’ll note, in the preceding paragraph, we said that one-tenth of one grain of Varget is three or four kernels. Well, “which is it?” you might ask. The answer is that it might be three, or it might be four, depending on the size of the individual kernels. That’s a disturbing uncertainty that we simply had to accept… until now.

Powder Kernel Uniforming — A Breakthrough
We now have the tools and the methodology to resolve the inherent uncertainty in individual kernel weight. Using the new technique of powder kernel uniforming, first pioneered by German Salazar, we can now, for the first time, ensure that every kernel of powder that goes into a cartridge is virtually the same weight — the same, in fact, within 0.01 grain (one-hundredth of a grain) TOTAL spread.

MFR ScaleFor a reloader looking to achieve “perfect” load weight uniformity, powder kernel uniforming offers the ultimate control over powder weight. The method we devised to uniform individual kernels consists of kernel core-drilling. The propellant we chose for this kernel-uniforming test was a new prototype (not yet commercially available) EuroChemie RL “X” propellant. This was chosen because it offered relatively large, can-shaped kernels that could be drilled relatively easily.

Powder Kernel Uniforming TestCore-Drilling Kernels with Micro Drill-Bits
The center of each kernel was bored out with a micro-drill. But here’s the key. Before drilling, we first weighed each kernel. Then we selected a micro drill bit of appropriate diameter to achieve uniform weights. With the heavier kernels (in the 0.04 gr range) we used a larger micro-bit. With the lighter kernels (in the 0.02 range), we selected a smaller diameter micro-bit that removed less material from the center of the kernel. Obviously, many kernels were ruined while we perfected the drilling process. It required great patience and a very steady hand. But after a few dozen hours of drilling, we had a batch of uniformed kernels that were all within plus or minus .005 grains (.01 grain ES). Now we were ready to do some testing.

Powder Kernel Uniforming Test

Powder Kernel Uniforming TestProof That It Works
All this time-consuming work to drill holes in individual kernels would be pointless, of course, if it did not produce meaningful accuracy gains. The proof, as they say, is “on the target”. We were curious to see if our uniformed powder kernels would out-perform unmodified kernels, so we did some field testing. We prepared two batches of 6mmBR ammo in Lapua brass, with full case prep, and bullet base to ogive sorting (we wanted to eliminate as many variables as possible). Bullets were Lapua 105gr Scenar Ls, which proved to be some of the most consistent projectiles we’ve ever measured.

One set of rounds was loaded with a carefully-weighed charge of unmodified kernels. Case to case charge weight was held to .05 grain (half a tenth uniformity). Then we prepared a second batch of cartridges with uniformed kernels, using the exact same charge weight, also held to .05 grain (half a tenth) tolerances. We took these rounds to the range, and did a “round-robin” test at 800 yards, shooting one of each type in sequence (i.e. one uniformed on right, then one non-uniformed on left) until we had two 10-round groups. The test was done with a rail gun fitted with a 1:8″ twist, 28″ Krieger 0.236″ land barrel. The uniformed-kernel ammo was shot at the right diamond, while the non-uniformed rounds were shot at the left diamond. Conditions were good, so we simply “held center” on every shot. No attempt was made to correct for wind as our primary concern was vertical dispersion.

Powder Kernel Uniforming Test

Ammo with Uniformed Kernels Shows Significantly Less Vertical Dispersion at Long Range
As you can see, the uniformed-kernel ammo out-performed the non-uniformed ammo. The difference is quite clear. The rounds with non-uniformed kernels (on the left) produced a 10-shot group with roughly 3.0 inches of vertical dispersion. On the right, our ammo with uniformed kernels produced a group with 9 of 10 shots showing roughly 1.75 inches of vertical dispersion (we did have one high flier among the uniformed-kernel rounds). Additionally, we had a lower 10-shot ES and SD with the uniformed-kernel ammo. We repeated this test two more times and the results were similar. The targets speak for themselves. If you are looking for ultimate long-range accuracy, powder kernel uniforming is a “new frontier” you may wish to explore. With all other factors held constant, we were able to reduce vertical dispersion by more than an inch at 800 yards by drill-uniforming our NitroChemie powder. That’s huge in the long-range game.

Yes, the kernel-uniforming process is incredibly time-consuming and tedious, and a set of micro-drills is not cheap. We also freely acknowledge that the process may be much less productive with narrow-kernel propellants that are hard to drill. (Also EuroChemie powders are preferred because the burn rate controlling compounds are impregnated throughout the entire kernel — not just the outside.) But the potential for significant accuracy gains is there. We proved that.

Is it worth the huge investment of time to drill your powder kernels? That’s a question each reader must ask himself. But if you know the competitor on the next bench over has uniformed his kernels, can you afford not to do the same? Sometimes the extra effort is worth it, just for the peace of mind you get knowing you’ve done everything possible to achieve “ultimate accuracy”.

Permalink Bullets, Brass, Ammo, Reloading 24 Comments »
January 19th, 2012

SHOT Show: Hodgdon Introduces New CFE™223 Powder

Hodgdon CFE 223 PowderHodgdon Powder has introduced a new spherical (ball) powder called CFE™223. Hodgdon claims that this new powder “greatly deters copper fouling” compared to other propellants. Originally developed for U.S. rapid-fire military systems, CFE™223 incorporates a proprietary chemistry named “Copper Fouling Eraser”. Based on tests with extended shot strings, Hodgdon claims that, by using CFE™223, match shooters, varmint hunters, and AR shooters can maintain accuracy for longer periods, with less barrel-cleaning time.

Load Data Now Available Online for CFE™223
Reload data for CFE™223 is available for 27 different cartridges with 147 loads. It is suitable for loading in many popular chamberings including: .204 Ruger, .223 Rem, 22-250, 6mmBR, .243 Win, 6.5 Creedmoor, .260 Rem, 7mm-08, and .308 Win. Maximum velocities are obtained in the .204 Ruger, .223 Rem, 22-250, and .308 Win with load data found at Hodgdon’s Reloading Data Center. CFE™223 is a spherical (ball) powder, so it meters well. The new powder will be available in one- and eight-pound containers starting in January, 2012. For more info, call (913) 362-9455 or write to: Hodgdon Powder, 6231 Robinson, Shawnee Mission, KS 66202.

Hodgdon CFE 223 Powder

Permalink New Product, Reloading 14 Comments »
October 11th, 2011

Hodgdon Claims New CFE™223 Ball Powder Deters Copper Fouling

Hodgdon CFE 223 PowderHodgdon Powder has introduced a new spherical (ball) powder called CFE™223. Hodgdon claims that this new powder “greatly deters copper fouling” compared to other propellants. Originally developed for U.S. rapid-fire military systems, CFE™223 incorporates a proprietary chemistry named “Copper Fouling Eraser”. Based on tests with extended shot strings, Hodgdon claims that, by using CFE™223, match shooters, varmint hunters, and AR shooters can maintain accuracy for longer periods, with less barrel-cleaning time.

Load Data Now Available Online for CFE™223
Reload data for CFE™223 is available for 27 different cartridges with 147 loads. It is suitable for loading in many popular chamberings including: .204 Ruger, .223 Rem, 22-250, 6mmBR, .243 Win, 6.5 Creedmoor, .260 Rem, 7mm-08, and .308 Win. Maximum velocities are obtained in the .204 Ruger, .223 Rem, 22-250, and .308 Win with load data found at Hodgdon’s Reloading Data Center. CFE™223 is a spherical (ball) powder, so it meters well. The new powder will be available in one- and eight-pound containers starting in January, 2012. For more info, call (913) 362-9455 or write to: Hodgdon Powder, 6231 Robinson, Shawnee Mission, KS 66202.

Hodgdon CFE 223 Powder

Permalink New Product, Reloading 4 Comments »
February 27th, 2010

Vihtavuori Releases NEW N570 Powder for Magnums

Vihtavuori (VV) has started producing N570, a new high-energy, double-base powder suited for magnum cartridges. The burn rate of N570 is similar to Vihtavuori N170 and Hodgdon H870, making it somewhat faster than 24N21 or Retumbo. The new N570 has the slowest burn rate of the five powders in N500-series of high-energy propellants. N570 is an extruded tubular powder with a large kernel size (similar to VV 20N41 and 20N29) and a high bulk density.

Vihtavuori N570

The characteristics of this slow burning, high-energy powder are well-suited for large volume cases like the 6.5-284 Norma, 300 Winchester Magnum, 300 Remington Ultra Mag, 338 Lapua Magnum or the 30-378 Weatherby Magnum.

Reloading Data for the new N570 Powder is available in the latest edition of the Vihtavuori Reloading Guide. (PDF).

CLICK HERE for Vihtavuori Reloading Guide (8th Ed.).

The new N570 was developed at the request of magnum cartridge reloaders. Vihtavuori told us: “Powder users have repeatedly asked for a powder suited to the needs of the largest magnum rifle cartridges. We have developed our new N570 High Energy powder to meet this special need in the market. N570 was developed to bring out the very best performance and velocity in large volume magnum rifle cartridges.”

VV Recommends Weighing N570 Charges
Because N570 has very large kernels, Vihtavuori advises that reloaders should always WEIGH N570 charges rather than rely on throws from powder measures: “We recommend that charges of this high-energy N570 powder be weighed, as measures do not always deliver consistent charges. This is especially true when the powder being used is of such a large kernel configuration. This may lead to a potential for either under- or over-charged cases, if the charges are thrown straight from the measure and not weighed.”

Vihtavuori Powders are imported in the USA by Hodgdon Powder Company and Kaltron Outdoors, and are marketed worldwide by Nammo Lapua,

Permalink New Product, News, Reloading 4 Comments »
January 28th, 2010

SHOT Show Report: Chris Hodgdon Sets the Record Straight Regarding IMR 8208 XBR

IMR 8208 XBR powderWe know many of our readers are interested in the new IMR 8208 XBR powder distributed by Hodgdon Powder Company. Early test lots of this new propellant have already won important benchrest matches, and field testing has shown that it is extremely stable across a wide temperature range. At SHOT Show 2010, we interviewed Chris Hodgdon, who gave us the “inside story” on this new powder. Before we started taping, Chris shared with us lab test results showing how pressure of a fixed load varied with ambient temperature. The data was stunning. Basically 8208 XBR showed almost constant pressures from below freezing to well over 100° F. This editor has personally never seen a powder test that revealed “flat-line” results like 8208 XBR, with recorded pressures remaining virtually unchanged over a huge temperature range. If the test results are to be believed, this is indeed a very exceptional powder.

On some internet Forums, skeptics have suggested that IMR 8208 XBR is just an “odd lot of H322″, and that, accordingly, 8208 XBR may not be available for long. Chris told us that the skeptics are misinformed — those who have suggested that 8208 XBR is re-labeled H322 are completely wrong. IMR 8208 XBR IS something new and it IS here to stay. IMR 8208 XBR is NOT merely a “tweaked” blend of H322. Though 8208 XBR has small kernels like H322, allowing it to meter well, 8208 XBR is a completely new formulation. Moreover, IMR 8208 XBR is not going to be a “one-production-run” wonder. Chris explained that Hodgdon is fully committed to long-term production of this new powder. So if you acquire some now, and develop a great load, rest assured that you will be able to obtain more IMR 8208 XBR in the future. As Chris explains in the interview, Hodgdon is strongly committed to IMR 8208 XBR and Hodgdon plans to keep it in production for a long time.

YouTube Preview Image
Permalink - Videos, Bullets, Brass, Ammo, New Product, Reloading 6 Comments »