Same here. I had several endcap strikes shooting factory fresh brand new IMI m855 through a Colt 6721 upper with an SWR Specwar-2 attached. Thankfully the can was not destroyed and after a short trip back to SWR, Joe confirmed that it was in no way adversely affected. But after that experience I stopped shooting heavy bullets through a suppressor on a 1:9 twist barrel. Could it have been the ammo? Sure and my experience is purely anecdotal and non-scientific.

