Thread: Thoughts on new barrel ' break-in '

Agree with @zimmer, it depends on whether you’re getting Cu fouling. If not, then minimal break in needed. If you’re getting Cu fouling then need to deal to it sooner than later. You may need to lap and polish the barrel yourself a few times. Easy enough to do. Observe Cu fouling from muzzle using LED torch after running a Cu solvent thru. If you’ve got excess Cu foiling the patches will be dark blue and you will see Cu build up in one or more lanz looking down the muzzle