March 8th, 2014

USAMU Hosts National Junior Air Rifle Championship

The nation’s top junior air-rifle shooters recently competed at the 2014 U.S. Army National Junior Air Rifle Championship hosted by the USAMU at the Pool Range Complex in Fort Benning, GA. Juniors (ages 14-18) competed for national titles in two divisions–Sporter and Precision — under the watchful eye of the USAMU’s shooter/instructors. More than $31,000 in endowment money was awarded to teams and individuals from the Georgia Youth Sport Shooting Foundation.

Junior Air Rifle Championship

Ashley Durham and her JROTC teammates from Dalton McMichael High School in North Carolina, brought home the Sporter Division title. Durham led the way, adding the Sporter Division individual championship to her collection of trophies. David Sink, from Columbia, Md., took home top honors in the Precision Division while he and his teammates from Queen Anne’s 4-H won the Precision national team championship.

Taking time out from training for the upcoming competition season, USAMU soldiers from the International Rifle section provided instruction and mentorship for the competitors. “I shot this very competition when I was a junior,” said Sgt. 1st Class Hank Gray. “It was hosted by the [National] Guard back then. It’s rewarding to go from a competitor to host and do the same thing for the future generation of shooters.”

Competitors and USAMU instructors
Junior Air Rifle Championship

Attendees said that the professionalism of the USAMU is what stood out the most at this year’s event. “Being here has been very uplifting,” said retired Air Force Master Sgt. Scott Davis, who brought the McMichael High team to the match. “The USAMU made it more than just a fun match — they provided a learning environment. They were the first to step in and show the kids how to do something[.]”

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March 8th, 2014

Boron Nitride Application Procedures for Bullet-Coating

hexagonal boron nitride bullet coatingIn our article on Bullet Coating we covered the basic principles of applying dry lubricants to “naked” bullets. This article covered the three main coating options: Molybdenum Disulfide (Moly), Tungsten Disulfide (WS2 or “Danzac”), and Hexagonal Boron Nitride (HBN or “White Graphite”). All three compounds can be impact-plated on to bullets with relative ease, using inexpensive equipment. Moly is still the most popular choice, but many more shooters are considering HBN because it is ultra-slippery, it is less messy, and it offers some advantages over Moly or WS2.

After we published our Bullet Coating feature, many readers asked for more info on HBN. Some current moly users had questions about switching over to Boron Nitride. Forum member Larry Medler has published an excellent web article discussing the process of applying 70nm HBN using plastic jars and a Thumler’s rotary tumbler. If you are working with HBN currently, or plan to experiment with Boron Nitride, you should read Medler’s HBN-Coating Article.

CLICK HERE to READ MEDLER HBN ARTICLE

After coating some bullets for his 6XC, Medler seems “sold” on the merits of HBN. Larry writes: “The coating process is much better than Moly — no black mess. My coating process times are the same as for Moly. Three hours of tumbling in the corn cob and three hours of tumbling in the steel balls with 3.0 grains of hBN Powder. The bullets look something like sugar-coated donuts when I dump the jar of steel balls with the freshly coated bullets into my sieve to separate. The coated bullets wipe clean to the touch with a little towel rub down and remain very slippery. So far I am very pleased with my coated bullets’ smoothness and appearance.”

hexagonal boron nitride bullet coating

Field Tests Are Very Promising
Interestingly, Larry’s HBN-coated bullets are shooting flatter, with tighter vertical, than his moly-coated bullets. Since he has also pointed the tips of this batch of bullets, it’s not clear whether the reduced drop is due to the pointing or the HBN coating, but the results are certainly encouraging: “I have shot the HBN-coated bullets a couple of times now at 600 yards and everything seems to be okay or a lot like Moly. Funny thing is the HBN-coated bullets are shooting higher by 7/8 MOA. I have to check the speed and see if it has changed enough for that POI change. Good news is I had a string of 15 shots with less than 1.5 inches of vertical which is the best I have ever seen with my rifles. Is that due to the hBN or bullet pointing?”

Photos courtesy Larry Medler, All Rights Reserved

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