Reloading for 3-Gun Competition — Practical Advice

This article by Corey Swantz originally appeared in The Reloading Press, the Sinclair Int’l Blog.

Much less precision is required to get good scores in 3-gun competition than in strictly accuracy-oriented disciplines like F-Class or Benchrest. In 3-gun, [the game is] about hitting targets in the shortest amount of time, not how close to the center of the target you can get or how small the group can be. Ammunition that’s accurate to 1-2 MOA is more than sufficient for 3-gun competition, as the targets tend to be 4-6 MOA in size.

For my personal 3-gun load testing, I used three powders: Varget, IMR 8208 XBR, and Accurate 2230. All three powders gave me good results, but the 8208 XBR was the leader of the pack. I settled on a moderate charge that pushes a 73gr Berger BTHP at about 2,500 fps through my 16″-barreled AR15. While I’m sure I could obtain a higher velocity with these bullets, this speed yielded the best accuracy results in my initial testing with fully prepped brass.

With the high volume of ammunition that I need for 3-gun matches and practice, I wanted to eliminate as many case prep steps as possible and still end up with ammunition that was accurate enough for 3-gun. I fully prepped some once-fired brass from primer pocket to case mouth and everything in between. I also took some once-fired cases that had simply been trimmed to length, and loaded them without doing any other prep work. With these loads in hand, I headed out to the range to shoot some groups. Below are the results from my 200 yard group tests:

Prepped Brass Delivered Higher Score on Bullseye Target

As you can see from the photos, the groups yielded results along the lines of what I expected. The fully-prepped brass produced five 10s , whereas the un-prepped brass produced only two 10s, and both of those just touched the outer edge of the 10-ring. However, the un-prepped brass kept all the shots inside the 8-ring, which is plenty precise for shooting the large targets used in 3-gun matches.

National Defense Match at Camp Perry

I decided to further test my un-prepped brass loads by shooting them in the National Defense Match (NDM) at Camp Perry and the Rockcastle 3-Gun Pro-Am Championship. At the NDM, the target used in the longer-range stages was a standard-size NRA Tombstone target, similar to the targets used in most 3-gun matches. Using the un-prepped brass loads, I was able to keep all my shots on the tombstone targets from 100-300 yards, and had only one miss from the 400-yard line. That one miss was my fault, as I jerked the trigger on the last shot, pulling it off to the left. Un-prepped brass held up quite well under Camp Perry NDM conditions.

Un-Prepped Good Enough for Class Win at Rockcastle 3-Gun Pro-Am Championship

Two weeks after the NDM, I traveled to Kentucky for the Rockcastle 3-Gun Pro-Am Championship. There were seven stages in this match, two of which required long-range rifle shots with my AR15. The longest stage of the match had eight steel targets sized from 4″ to 10″ in diameter, placed from 75 to 265 yards. My ammunition proved accurate enough at these distances to neutralize all the steel targets with single shots, something few other shooters were able to do. I finished over two seconds ahead of the nearest competitor on this stage and ended up winning the event. Clearly un-prepped brass was plenty good for the Rockcastle 3-Gun Pro Am, too!

Because of the results I’ve gotten on the practice range, and two very solid performances in competition last year, I feel confident that my loading process for the upcoming 3-Gun Nation Semi-Pro Series will consist of simply sizing and trimming brass, then loading it with my preferred recipe. While the fully prepped brass was indeed more accurate, the un-prepped brass loads were accurate enough to allow me to hit 3-gun targets . Now, I can take the time I save in the reloading room and spend it out on the practice range.

Corey Schwanz, Sinclair Reloading Technician



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Tags: 3-Gun, Ammunition, Brass, Rockcastle Pro-Am, Sinclair Int'l, Three Gun