Quote:
Originally Posted by Daredevil63
I'm looking for some advice on reloading 5.56 sub-sonic ammo.
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WHY bother?? If you have a nut for .556,, look at Engle Ballistic Research's MM Ultra Stealth Match Ammunition.. It is sub-sonic but will not cycle an M4 action. That's by design. Cycling the action can make as much noise as the sub-sonic crack...
If you want quite, read up on the development of the .300 Whisper (as mentioned) or the 9x39 VSS "Vintorez", a necked up 7.62x39.
ALthough there are .22 cal rounds that are quite,, They are typically limited to short ranges, because of feeble terminal ballistics, lobing trajectories, and wind drift inaccuracies..
The other end, big and slow, is not only easer(read safer) to develop,, but there is a world of ammo already available..
Before you spend a bunch,, you may want to sit down and state the obvious,, what is the range, what are the expected terminal ballistics, what is the target penetration requirements.
I think you might find the .22 cal lacking in almost all areas...
Good Luck,,,