Rusty - there are several .408" slug moulds available, up to 400gr. or perhaps a bit higher. Do you use them? Also, you are probably aware that WW and WW/pure lead mixes are easily hardened and tempered for varrying results on game, from FMJ-type performance to excellent expansion on N.American game. I prefer mine to be .001" to .002" over groove diameter for leading free, accurate shooting.
; The larger bores are pleasant cast bullet shooters, due to their wilingness to shoot factory-type velocities without any normal cast bullet problems. Recently, I've found Lyman's moly bullet lube to be as good as 60/40 beeswax/Vaseline mix for smokeless loads in the .45 cals.