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Old September 24, 2011, 07:54 PM   #10
James K
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Join Date: March 17, 1999
Posts: 24,383
Just FWIW, but folks who fool around with suppressors know all about a precursor wave. This is a blast of gas and air that precedes the bullet out of the barrel. It is comprised of the air in the barrel, plus any gas that has leaked around the bullet in the leade or on its way up the barrel. Normally, it doesn't affect the bullet since it is ahead of the bullet and is out of the way by bullet exit. But it seems to me that if anything attached to the muzzle allows that gas to bounce around instead of escaping, it could interfere with the bullet as it exits and that could be bad for accuracy. I don't think the propellant gases would be much of a problem as they are behind the bullet, but I wonder about that precursor wave.

Jim
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