Originally Posted by R_H_Clark
Originally Posted by Brad
Before I answer, what does your Forbes mic at the muzzle?


I don't know my friend,I don't yet own a mic. I can tell you for sure it's a good bit larger than the Montana. If that's a likely reason and a new barrel will possibly fix those issues,just tell me. I'm not some a hole that wants to argue just for the sake of arguing. You don't have to frame your response for defense.


.550" ish on my 20b's

Caliper

http://www.harborfreight.com/6-inch-digital-caliper-47257.html