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.45 silencer on a .300 whisper? Doable?

Discussion in 'NFA Firearms and Accessories' started by Eyesac, Sep 28, 2010.

  1. Eyesac

    Eyesac New Member

    I have a YHM cobra M2 (.45) in on the way, and I was wondering if anyone has tried to put a .45 can on a 300 whisper (sub sonic loads only). Is it quiet? Not quiet? Exploded in your face? Any experience or advice out there?

  2. strambo

    strambo Active Member

    Probaly need to contact YHM...it either can handle the gas volume/pressure or it can't. .45 ACP doesn't have a lot of gas or pressure compared to even a .223
  3. Zak Smith

    Zak Smith Moderator Staff Member

    According to QuickLoad, the muzzle pressure of a 220gr at 1100fps from a 10" .300 Whisper using H110, should have "about the same" muzzle pressure as a 230gr .45ACP from a 5" barrel using Unique, IE 4000 psi +/- 500.
  4. Eyesac

    Eyesac New Member

    Thanks! I was under the same impression, but wasn't positive... How about sound, any one try it. I know people use 9mm cans for 300 whisper, but don't know how .45 would sound. Anyone?
  5. Zak Smith

    Zak Smith Moderator Staff Member

    I've only fired the .300 through our full .30 caliber suppressor, so I don't have any comparative data. When I get around to it I'm going to make one that's 30% shorter for the .300 just so the SBR ends up shorter.

    A subsonic .300 Whisper is much more similar to .45 ACP at the muzzle than a rifle round. Typically, in full rifle rounds, shooting .308 through a .338 suppressor doesn't impair it too much.
  6. The pressure might also quickly be reduced by the fact that the can is not wrapped as tightly over the bullet (.45-.50 bore rather than .308-.375 bore of a .30 cal can).
  7. Kenny_SilencerCo

    Kenny_SilencerCo New Member

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