New for me as well. I was getting baffled strikes with a Ruger American Compact in 6.5cm and a TBAC Ultra 9 6.5 can. Pretty sure they told me I was at .047” runout when they receive the rifle. Took it to the range yesterday and it is shooting great now.
Sorry to derail the original question, but at the range yesterday I shot next to a guy running a side port brake, and it was miserable to shoot next to him. Prior to buying suppressors, I always shot with a muzzle break, but now I will never shoot/hunt unsuppressed. So many advantages and the only downside is my 6.5 PRC has a 24” barrel with a TBAC Magnus, which adds weight and length, but I’ll take that trade off any day.