Weird Scratches In New Barrel

[Harpoon1]

A5B, if the OP didn't have a bore scope, we would not have this interesting topic for the forum. Many uses including verifying port alignment with gas block, chamber condition, where in the barrel copper fouling happens (if it does at all), throat erosion amount, brass interior condition just to name a few.

+100 !

It’s some of the best money I ever spent! They’re going to have to pry mine out of my cold dead hands!