After looking at MMP's website, I have to ask whether certain of their sabots can be used with cast bullets? What I have in mind is trying their HPH 12 (green) sabot with a .430" Keith CB (either Lyman #429421 or the RCBS equivalent) and their Orange sabot designed for .457" - .458" CB's, in this case either the Lyman 330gr. Gould HP or the 340gr. Lee CB. Both will be loaded over 70 - 80grs. Goex FFg. Is this a good idea or not? Btw, the alloy will be wheelweights + 1% Sn.