Hello, carprivershooter. Fire lapping is done by forcing an abrasive grit into the surface of a bullet, either lead or jacketed, and firing a with a VERY light charge of fast burning powder. I have done this with an original 1898 Krag rifle, & 1903 Sprgf. The problem is that if not careful..the throat can be lengthened. Also, groove dia. can increase. In my case, the bore was loose about 6" forward of chamber..this was common with turn of century military arms from powder erosion. F.L. cured problem, brightened up bore, even grooves, very very slight taper..measured in tenths of thousand. Accuracy greatly improved.
That said, I don't think you need, or should use such a drastic procedure on your rifle. Have you tried JB compound on a tight patch as per instructions? And after that, some JB Bore Bright..this usually will brighten things up nicely. Just be sure to use a good quality cleaning rod and rod guide. Best of luck!
