I use pure, wheel weight and linotype . I find the ww lead a reasonably close approximation (in hardness) to linotype and, depending on the mould, the bullets drop out easier. (Pure lead bullets drop out the easiest.) If you're going to cast bullets for a center-fire rifle, the ww lead - with a gas check - will give you a very good bullet ....for roughly 18 cents a shot (primer 4 cents, gas check 4 cents, powder 10 (varies depending on the shell and volume, eh). You can shoot all day for 20 bucks. Do it.