Air barriers with suppressed 300?

[Rancid Coolaid]

I've shot a few groups that look like this now, and it is an unusual thing.

I talked with a guy who has more suppressor (and subsonic) experience than me and he said it looks like an air barrier issue with a slanted baffle can.

Anyone else seen this?

Rounds were not rapid fired but were shot with short interval between. Nothing went super-, all were hand loads, should have been right around 1025FPS. All loads made at the same time, same components.

It was a windy day. The rifle has shot very nice groups, but there was more time between rounds that day (barrel break-in.)

Next trip to the range will be to shoot groups without can, shoot groups with can with chrono, and shoot groups with can and with Cor Bon factory subsonic.

Any help or insight would be greatly appreciated.


The rifle

[Rikky Lee]

Do as described. In particular, shoot without the can as you describe and tell us what happens. A factor to bear in mind is also the change in barrel harmonics with the heavy weight on the end.

Air barrier issue is a new one for me though.

[Spook]

I am dumb, what is an air barrier

[Rancid Coolaid]

Air barrier is a pressure differential due to the baffle design. I've been told slanted baffles can cause air barriers and can show stringing in groups like this.

Then again, it could just be high winds.

More to come when I get to the range and do some test shooting.

[Alleycat]

Air barrier = barrel touching the stock due to the extra weight of the suppressor and insufficient clearance.

[Rikky Lee]

Also try with the silencer on at 50 yards and compare group sizes.

I'm thinking a weight issue still tho'.