Topic: Subsonic 308 loads

[broncovan]

So I'm fooling around with some 308 subsonic loads.  I just got my stamp back for my AAC 762 SD and decided to see what the subs sounded like.  They turn my Rock River 308 into a single shot, but it's whisper quiet.

I'm using some old 180gr round nose bullets with IMR Trailboss for now.  I may go to 170gr round nose depending on how these group.

My barrel is a 1-10 twist and I don't think I'd use 180gr bullets in anything slower.

I started at 9.5gr of trailboss and get very minimal keyholeing at 50 yards.

I've got some more loaded up at 10.2gr - 10.5gr that I'm going to try tomorrow.

So far the can and subsonics have been a lot of fun.  Almost no recoil, and it sounds like an airgun.  You hear the bullet hitting the target more than anything else.

[TrooperBrian]

I've tried some with 7.0 of Bullseye and 168SMKs, worked pretty well. I just tap the base of the round before chambering to settle the powder near the primer.

Shooting Summary 010611: .308 Subsonic Suppressor Load Testing

[Grumblecakes]

I've used trailboss to make 223 subs. IMO it's probably one of the safer powders for subs since it has a huge grain size. I think I paid around 12 for half a pound. Probably will never use it all since without a suppresor subs are more of a novelty for me. On the plus side sub brass is super easy to size.

Reminds me I saw some where a while back where a guy drilled a new gas port just forward of the chamber and it would cycle subs. I can't seem to find it again if anyone has the link...