stalkingbear, you may be right about the handlapping being better that firelappng. IF it is done by someone who truely knows what they are doing. but for average joe, who is not a gunsmith with this type of experience, we could screw up a barrel much faster trying to hand lap it. at least with a firelap kit, the bullet moves in one continual direction, with even and straight "strokes" if you will. now, turm loose a novice with a cleaning rod and some abrasive compound and see how even the barrel turns out. i really can not imagine it would be good, if it was even useable afterwards. i do not know what happened to the barrels you had to change out for customers. but for me, this worked quite well. i cant even imagine what it would cost to have a competent gunsmith lap a production barrel, or how it would turn out. do you normally have to cut the muzzel end off from a barrel and recrown it after you lap them? i read that someplace, because supposedly the ends of the barrel flare outward in a funnel shape. and there is no one near where i live that does that kind of work, so i do not know.