the best process for lead bullets is to not lead the gun to begin with...then one does not need a lead removal product.
1)a lube that makes it to the end of the bbl
2)dia to fit the gun( aprox .001 over bbl throat dia/slighly under cyl throat dia and if the muzzle is larger you are fighting an up hill battle).
3)hard enough for the velocity you are shooting.
i shoot a 44 mag in a match once a month , aprox 65 rounds of 300 gr bullets..and have no leading...i clean the cylinder and run a wet patch thru the bore...done.
mike in co