I shoot occasional vintage military matches at a club in central CA. We use an electronic scoring system that requires the bullet be supersonic at the target distance of 200 yds. I have long used the “universal load” of 16g 2400 behind the Lyman 314299 or 311334 in my ‘03A3 but there was an occasion when a shot failed to register on the target. I suspect my bullets are barely supersonic at the target. Would increasing the charge to 17g give enough velocity or should I go to 18g or more?
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Pete,
The Lyman Cast Bullet Handbook 3rd edition says that bullet should be doing about 1400 fps at the muzzle to be comfortably supersonic at 200 yards. My 03-A3 does 1450 fps with 17 grs. of 2400 and the 314299, so kicking your charge up a grain should do the trick
Glenn
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I shot the 311284 for years, but to stay supersonic at 200, I had to load 18 grains. They weighted 215 grains so lighter should be less. My understanding is that those systems also do not function with "transonic" bullets either.
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And thanks to you too, Ric. I’ m honored to have the advice of such respected contributors.
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