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Suppressed 300 blackout subsonic....not quiet.

I've stood next to .300 Blackout AR's, subsonic ammo, run through suppressors before.
They sounded nice and quiet to me. As good as any centerfire round can be from a normal-length can threaded on a gun's muzzle.

Question: What were the circumstances of shooting it? Were you at an established range, where you are used to hearing loud noises? It might sound quieter there. Were you in your own basement or garage? It will usually sound a lot louder under those circumstances. If you take it out in the front yard and shoot it at 3 a.m., it will sound very, very loud!
 
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