I have a super blackhawk and a redhawk, both in stainless, both 44 mag and both have cylinder throat diameters of .431 in. That seems about 1 or 2 thousands large considering available cast bullets are usually .429 or.430. Both guns lead the first inch of the barrel with every round that i have have devised. have used hard cast and not so hard bullets. I suspect the problem lies with the throat/ bullet dia. mismatch.What cylinder dias. are members here finding with ruger revolvers and what solutions have you come up with when cylinders are oversized, or is that even the problem? :?