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Fire lapping can do much to improve those chatter marks from the rifling in your bore. Just follow the instructions carefully, and don't overdo it either! Too much of a good thing applies here, and I've seen guys shoot so many with lapping compound that they wore their bore out before they realized it.
Those chatter marks appear to be either not enough cutting fluid, or pushing the tool too fast. But it can be saved with proper lapping. In the old days gunsmiths would spend all day hand lapping bores to get them to be extremely smooth. But thy'd probably have tossed a barrel that bad vs. take all the time required to hand lap it smooth.
Those chatter marks appear to be either not enough cutting fluid, or pushing the tool too fast. But it can be saved with proper lapping. In the old days gunsmiths would spend all day hand lapping bores to get them to be extremely smooth. But thy'd probably have tossed a barrel that bad vs. take all the time required to hand lap it smooth.