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June 25th, 2015

ABM .308 Win Ammo with Berger 185gr Juggernaut Bullets

ABM Ammunition Ammo Juggernaut Berger Bullets 185

ABM Ammo, a division of Berger Bullets, has introduced new, high performance .308 Winchester factory ammunition, loaded with the high-BC, 185gr Berger Juggernauts. The long-loaded “Match Ready” version of this ammo is designed for Palma (Full-bore) and F-TR shooters. A “Mission Ready” version, loaded shorter to mag length, is designed for tactical and military applications. These two new offerings should “raise the bar” for long-range performance with factory .308 Win ammo.

Offering a high Ballistic Coefficient (0.560 G1, 0.283 G7), the 185-grain .308-caliber Juggernaut bullet is designed to remain stable even in the transonic zone. This way it offers good performance at extended distances, contributing to higher hit percentages at longer ranges.

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June 25th, 2015

Tech Tip: Keep Your Ammo Cool this Summer

Heat Map USA color chart

It’s vitally important to keep your ammo at “normal” temps during the hot summer months. Even if you use “temp-insensitive” powders, studies suggest that pressures can still rise dramatically when the entire cartridge gets hot, possibly because of primer heating. It’s smart to keep your loaded ammo in an insulated storage unit, possibly with a Blue Ice Cool Pak if you expect it to get quite hot. Don’t leave your ammo in the car or truck — temps can exceed 140° in a vehicle parked in the sun.

Ammo cool storage

Bosch Insulated tool caseTo learn more about how ambient temperature (and primer choice) affect pressures (and hence velocities) you should read the article Pressure Factors: How Temperature, Powder, and Primer Affect Pressure by Denton Bramwell. In that article, the author uses a pressure trace instrument to analyze how temperature affects ammo performance. Bramwell’s tests yielded some fascinating results.

For example, barrel temperature was a key factor: “Both barrel temperature and powder temperature are important variables, and they are not the same variable. If you fail to take barrel temperature into account while doing pressure testing, your test results will be very significantly affected. The effect of barrel temperature is around 204 PSI per F° for the Varget load. If you’re not controlling barrel temperature, you about as well might not bother controlling powder temperature, either. In the cases investigated, barrel temperature is a much stronger variable than powder temperature.”

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June 25th, 2015

Finger-Painting to CNC Inletting — Inside Look at McMillan Stocks

McMillan Fiberglass stocks factory videosOK, admit it — you’ve always wondered how they get those color swirls and camo patterns in McMillan stocks. (You’ll be surprised at the answer). And how does McMillan manage to inlet stocks so precisely for so many different action types?

McMillan Stocks is one of the leading fiberglass stock producers, cranking out 8,000-10,000 stocks every year for hunters, target shooters, and members of the military. McMillan employs state-of-the-art, high-tech machinery. At the same time, many processes are still done by hand — such as applying colors to the stocks.

In the videos below, Kelly McMillan hosts Bob Beck of Extreme Outer Limits TV in a tour of the McMillan stock-making facility. We think all avid “gun guys” will be fascinated by these high-quality videos.

McMillan Custom Stock Production

The first video shows the stock-building operation from start to finish — You’ll see the lay-up, color application, molding, and “stuffing”. Watch carefully at 0:16 to see colors being applied.

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