I actually quite surprised you haven't been chastised for wanting to break in a barrel. There are a lot of non-believers out there, most of whom have NOT ever tried the concept. My way, short of using the LBT method of lapping the bore is to fire a shot, clean- fire a shot, clean, etc. The purpose is to smooooth out any rough spots in the bore or, burnish it, if you will. How many shots is up to you 25 to 50 is not out of line. The thing to remember, is to get all the fouling out, copper and otherwise, from the bore after "every" shot. This is done by wrapping a patch tightly around a undersize brass brush, with J-B bore paste and giving it about 50 strokes. If it starts to feel loose wrap another patch around it. Go through it then with an ammonia based solvent if you want to see if the copper is all out. Then, get all the solvent out, run a slightly oiled patch through to lubricate for the next round and go fire a shot, Repeat. Plan on killing an afternoon. In the end you will have a bore that will not foul as badly and it will be a snap to clean, completely getting out all the copper fouling. If cost is a factor (and it always is) buy some cheap fmj for the break in, I really don't see where that would matter. Your basically shooting them into a backsop anyway. CRASH87