For some reason I'm struggling to get the same accuracy with my own cast RB's as I do with the swaged .457 Hornaday RB's. This is in my ROA. Is it because of the sprue nub? Better uniformity with swaged? My RB cast mike at .457 and shave a ring of lead just like the swaged ones. Just trying to figure out why this is... I cast with pure lead with a TINY bit of tin added.