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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 Senior Member

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    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?

    Thanks!
     
  2. strambo

    strambo Senior Member

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    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

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    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 Senior Member

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    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

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    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. SharpsDressedMan

    SharpsDressedMan member

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    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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