ORIGINAL: whiskeysnoot
Barrel break-in is purely subjective. Impossible to prove or disprove.
Not at all. Brian pierce did a good article on it in Rifle mag. He carely marked the spots in a barrel where there were slight tooling marks in a barrel or any other rough spots with a bore scope. Then carely documented what happened during each break in cycle. Cleaned them right up. I have found the same. Thats not subjective at all.