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Thread: Subsonic 9mm

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  1. #1
    Graduate
    Join Date
    May 2012
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    9,288

    Subsonic 9mm

    Does anyone have a quiet load that they would share? I've played with a few and the quietest I've come up with is 2.9 grains of 700X and a Sierra 115 grain hollow point loaded in WW cases with a WW small pistol primer. I'm getting 1020 fps with this load and its noticeably quieter than any of the factory 147 grain loads I've tried. This is in a 16 inch carbine barrel . The only problem as far as I can tell is that 700X is little dirtier than I like. The fact that 9 MM carbines are blow back actions doesn't help with this either.
    Last edited by FLT; July 9th, 2017 at 04:10 PM.
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