pjb45 Posted April 4, 2013 Share Posted April 4, 2013 Has anyone tried the Sub-sonic, 1000fps ammo from Gemtech in their TS uppers? A local guy is getting a boat load in, but I do not want to purchase any unless it will work in my TS uppers. thanks Link to comment Share on other sites More sharing options...
D.Hayden Posted April 4, 2013 Share Posted April 4, 2013 (edited) Has anyone tried the Sub-sonic, 1000fps ammo from Gemtech in their TS uppers? Isn't that too fast to be sub-sonic? My mini-mag stuff says 710fps? (haven't tried it yet) The Remington Thunderbolt Sub-Sonic runs well Edited April 4, 2013 by D.Hayden Link to comment Share on other sites More sharing options...
wgj3 Posted April 4, 2013 Share Posted April 4, 2013 That is some slow mini-mag. It should be in the 1300-1400fps range. Generally, stuff in the neighborhood of and just under 1000fps is considered subsonic. Link to comment Share on other sites More sharing options...
Jaxshooter Posted April 4, 2013 Share Posted April 4, 2013 The Marvel conversions run without a problem with subsonic ammo. I have shot them in both Marvel conversions and my Model 41 S&W with excellent results. Link to comment Share on other sites More sharing options...
D.Hayden Posted April 4, 2013 Share Posted April 4, 2013 That is some slow mini-mag. It should be in the 1300-1400fps range. Generally, stuff in the neighborhood of and just under 1000fps is considered subsonic. Sorry.. it's CCI.. 29 grain.. 710fps - and just realized it's 22 Long, not 22 Long Rilfe None of the others stated on the box, I just 'assumed' they were all in that range On the CCI site.. the 22LR Quiet is the same speed Link to comment Share on other sites More sharing options...
hornetx40 Posted April 5, 2013 Share Posted April 5, 2013 Has anyone tried the Sub-sonic, 1000fps ammo from Gemtech in their TS uppers? Isn't that too fast to be sub-sonic? My mini-mag stuff says 710fps? (haven't tried it yet) The Remington Thunderbolt Sub-Sonic runs well The speed of sound is 1125 FPS this changes according to elevation and air density. Generally anything that is 1080 fps or less is subsonic just to give yourself a bit of wiggle room. Check velocity out of your gun because an inch of barrel once you are under about 15"s makes a huge difference Link to comment Share on other sites More sharing options...
Bunsen Posted April 9, 2013 Share Posted April 9, 2013 Never had any issues with Browning Buck Marks using the stuff. Link to comment Share on other sites More sharing options...
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