Re: fire-lapping bullets yes or no?
I used the Beartooth method with their bullets in my Ruger Blackhawk. It worked great. I was amazed at the few # of shots it took to really show forward progress of the forcing cone. I fired 12 lapping rounds and it really moved things. It did what it was supposed to, less lead, more accuracy, more speed, way easier to clean. The only way I would do it to a centerfire rifle barrel was if it was a rough factory barrel that I was going to rechamber after I was done. A true match grade barrel (Shilen, Hart, etc) are hand lapped already the only roughness you will have is where the smith ran the reamer in, the burrs will only be at the end of the throat were the rifling starts. My Hart barrel quit showing signs of copper after 9 shots, all done with the one shot and clean method. It hasn't coppered since and that was over 500 rnds ago. I would recomend a break in process of one shot and clean for this reason alone.