I bought JB bout paste because of the reviews and JB says it doesn’t harm bores. I have no doubt other polishing paste would remove material. What makes you think JB will do the same? Just curious.
Just a
suspicion of mine after some Cast Bullet usage on an OLD Colt 1911 I inherited. The bore of that Pistol may have been worn to begin with.
I wound up replacing that Barrel for a lot of reasons, but I had put close to 2000 rounds through it, and had used JB Bore paste on it quite a bit.
What really put an end to that barrel was getting lower velocities than I should have. This indicated a worn throat. The newer barrel cured that, in addition to fitting better.
I should probably re-evaluate usage of it. Unfortunately, what Gun Shops we have left in the area, don't carry it.