Something to try - I use Tubb Final Finish, it smooths the barrel out, cleans tooling and chatter marks. Have 3 stealths, all .5 MOA, all using Final Finish. Priced it out and at roughly $1 per round it works out same as breaking in by shooting. You can use every 500-600 rounds to clean up the barrel and cleaning is much easier, does not appear to copper foul nearly as much. No finanical interest, just a product I like.