dcali
Bullet Maker
I did this for *minutes* on full throttle, swapping out patches with new paste when they got gunked up. Not even a tenth of wear on the weakest steel out there. It's just not an issue to push a patch down the bore a few times. I'm sure you could try it with sharp edges, but You'd probably tear up the patches and never get any wear. Try it - you'll be convinced.A smooth surface, is different than the edge of the lands. A corner sands much easier than a flat surface. If your rifling is sharp ? That edge is the first thing to go.