I am going to be purchasing a Thunderbeast suppressor. I am looking at the 30p-1 and the new 30cb9. My question is...Has anyone had any issues with the direct thread messing up the crown of the barrel? I will be shooting this suppressor on a 308 and 6.5cm, so it will be swapped to whatever gun I take to the range. My concern is the constant on\off messing up the crown thus affecting accuracy.