I have a Cadex action with a 16” 1:8 twist CF barrel in 308 from Proof Research with a socom muzzle brake. I took it out yesterday and shot Barnes 168 gr ttsx bt and hornaday precision hunter 178 gr eldx. With out the suppressor the rifle shot tight groups (touching). Once I installed my surefire 300 sps suppressor the groups opened up to 1.5” to 2 inches at 100. Has anyone had similar experience? Next weekend I was going to try my direct thread 30 cal suppressor to see it there is a difference. The surefire didn’t have the same issue on my GAP HRT in 260.