I have ASR breaks and flash hiders on all of my rifles. My Omega gets around, if you know what I mean ;-). The only rifle I had any trouble with was my 18" 6.5CM bolt gun. Everything shot the same, no POI shift at all, except with my 140gr A-Max load. All of my other 140gr bullets held exactly the same. And the A-Maxes stayed the same with my other 6.5CM rifle. But, with the short rifle, it opened up to a 4" group. I sped the load up some and it helped some. But, I mostly just avoid these bullets with this rifle. SST's and Hornady HP Match bullets are all I load anymore, because of this issue. Try another bullet. I hope this helps.
The psycho nut bags have always been there. They just get better press now.
Take away their guns, they'll use knives. Take away their knives and they'll use sticks!!