Where is a good source for 50-70 brass? I have a Sharps carbine and would like to work up some loads for it (informal target, plinking and hunting deer sized game). I think I'm gonna need around a 550 to 600 gr. bullet for the 1 in 22" twist, I'd like to go lighter but don't know if a 450gr. would shoot real well in that fast a twist. I don't see anything heavier than 515gr. in the Lyman bullet moulds.
Thanks