300 blackout load?

DAMMITDON

February 12, 2013 01:57

need loading data on sub sonic A/R 300 black out,with can

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  steve45

  February 12, 2013 05:15

  300 Blackout is so new that theres not a lot of info available. The most I've found is at www.300aacblackout.com there is a discussion forum with the designer as moderator and an entire thread about reloads.

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  wanted man

  February 12, 2013 09:19

  300 blackout is THE SAME as 300 whisper(R).....use Whisper(R)reloading info
  I don't shoot it and I'm @ work, so I don't have any loading manuals handy, but there is plenty of load info available

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  lksmith03

  February 12, 2013 18:52

  my pet load is 10.0gr SR4759 under 200gr Speer HotCor
  velocity range is 1071-1125fps Cycles reliably from Carbine length gas system and stock carbine lower, and HTG M30-A. very quiet, makes a hiss like opening a soft drink
  Mine doesn't lock back but cycles. However with a heavy hammer spring cycling reliability is spotty.
  I have experimented some with H4198 using charges 9.5-12.1gr but haven't chronoed and haven't done enough testing to speak to reliability on.

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  lksmith03

  February 12, 2013 18:55

  I used SR4759 and H4198 since the "recommended" powder (Accurate 1680) is not available within 100 miles, so I went with burnrates similar to that. One thing to note is that most300 Whisper loads were developed for single shot and bolt action rifles, not semi autos, so many loads will not cycle an AR.

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  DAMMITDON

  February 13, 2013 00:02

  THANKS FOR THE HELP,DON

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