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koz · 03-24-2015, 19:40

I got the 6.5G as a hunting rifle that was lightweight. It will do well with deer, hogs, coyotes, etc..

I love the 300BLK round for a multipurpose round. Look at the Sig MCX. It should replace all Sub-guns. (Think MP5SD, UMP, 9mmSMG) Use the Lehigh 194gr bullets that are subsonic but have great expansion when you want very quiet and low penetration. Then if you need to step up to a rifle round to get on/off target - think Iraq / Somalia, etc.. Put the 110gr TAC-X (Barnes) and you've got an awesome round. The Sig has a 8" barrel then add the suppressor. Not much bigger than the MP5SD.

I've killed a lot of deer & hogs with my 300BLK.

As far as suppressors making the round go sub - there are a few barrels (MP5SD, some integrally suppressed .22's) that are ported before the suppressor to drop the velocity to subsonic. But the round has to be around the 1070-1300fps mark to drop it below supersonic. It's not the suppressor, it's the ported barrel.

A supersonic round (5.56/308/300WM) even suppressed will have a significant noise signature from the supersonic crack. An AR platform will usually have more noise at the shooter's ear than the muzzle due to gas coming out during cycling. There are suppressor companies that are working to reduce the back pressure but the supersonic crack is something you can't get rid of.

You can do a subsonic 308 load (180/190gr bullet with Trailboss powder) It's safe as that powder is really high volume (I use 10.7gr with no filler) But even then, you still have more noise than the 300BLK. I think it's more gas due to more powder burn.

03-24-2015, 19:40	#10
koz Quiet Professional Join Date: Feb 2007 Location: TN Posts: 933	I got the 6.5G as a hunting rifle that was lightweight. It will do well with deer, hogs, coyotes, etc.. I love the 300BLK round for a multipurpose round. Look at the Sig MCX. It should replace all Sub-guns. (Think MP5SD, UMP, 9mmSMG) Use the Lehigh 194gr bullets that are subsonic but have great expansion when you want very quiet and low penetration. Then if you need to step up to a rifle round to get on/off target - think Iraq / Somalia, etc.. Put the 110gr TAC-X (Barnes) and you've got an awesome round. The Sig has a 8" barrel then add the suppressor. Not much bigger than the MP5SD. I've killed a lot of deer & hogs with my 300BLK. As far as suppressors making the round go sub - there are a few barrels (MP5SD, some integrally suppressed .22's) that are ported before the suppressor to drop the velocity to subsonic. But the round has to be around the 1070-1300fps mark to drop it below supersonic. It's not the suppressor, it's the ported barrel. A supersonic round (5.56/308/300WM) even suppressed will have a significant noise signature from the supersonic crack. An AR platform will usually have more noise at the shooter's ear than the muzzle due to gas coming out during cycling. There are suppressor companies that are working to reduce the back pressure but the supersonic crack is something you can't get rid of. You can do a subsonic 308 load (180/190gr bullet with Trailboss powder) It's safe as that powder is really high volume (I use 10.7gr with no filler) But even then, you still have more noise than the 300BLK. I think it's more gas due to more powder burn.
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