Or use copper jacketed lead bullets, that's what most cartridges sold use anyway. Perfectly fine to use in polygonal barreled firearms. That's what I would use. The copper jacket reduces lead build up considerably in the barrel of any firearm, with any type of rifling. About the only non clad lead bullet cartridges I see in hand gun calibers any more are .22 or .38 special.
Tom
Live today, tomorrow may not come!
Boberg XR9S
Kahr CW40
Springfield Armory 1911
Dan Wesson Revolver
HY*NDAI is to cars, what Caracal, Hi-Point, and Jennings is to handguns. The cars may or may not run ok, but the corporation SUCKS.