short_start
I once tried some 50 cal speer bullets in a 50/54 cal sabot supplied by speer also (have no idea who the sabots were really made by & I can not find them now) But they were to tight to get down either the Lyman or the Renegade.
That was a long time ago (3/4 years) things change a lot in that time span - so maybe today they might fit - but I am thinking they are designed for 50 cal - so a .502/3/4 might make them to tight to get down, but totally just guessing...