I am getting ready to order a Keith type bullet mould from Accurate for my SW M629 (4") and was wondering about the differences in diameters between 16-1 - Lyman #2 and Linotype? I load mostly moderate to heavy...depending on intended use. Linotype when fly fishing in bear county the other two for hunting or target. I intend to measure the throats but and wondering how much the diameter differs from the different alloys?