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Site News 2024's Favorite CCW? | PSA Micro Dagger
Archived [ARCHIVED THREAD] - Velocity/Barrel Length for Suppressed 9mm AR?
Posted: 3/20/2017 8:57:20 PM EDT
Now I know the answer here is dependent on many factors, but can anyone tell me what they have found to be the best (quietest) velocity for a suppressed 9mm AR? Obviously 147gr moving at 950fps is further below the speed of sound, but I'd like to bump it up to 1050fps with a longer barrel if the extra 100fps didn't negatively effect sound signature that much.

Link Posted: 3/23/2017 8:35:24 AM EDT
[#1]
Subsonic is subsonic.

http://www.ballisticsbytheinch.com/9luger.html

Link Posted: 3/30/2017 9:53:55 AM EDT
[#2]
I have a 10.5" 9mm from PSA.  With my Osprey9 and Speer 147 TMJ, I literally can not hear the rounds indoors.  I can hear, and feel the bolt cycling and buffer and recoil spring compressing at my chin, but no report.  Bump it up to Blazer Brass 115, and it is a completely different story.  Next range trip, will try some 147 HST's and Ranger 147's.

Archived [ARCHIVED THREAD] - Velocity/Barrel Length for Suppressed 9mm AR?
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