UC

I do believe you are right the older black MMP's with shorter petals were built basically for the overbore Knights - so they probably are equivelent to 12's if not a wee bit thicker.

OK - i forgot I had a speed loader here in the house with a .451/260 grain nosler and a HPH-24 sabot... just put the digital mic on it .505 .5055 .506