i'm accustomed to reloading for revolver calibers,shotguns,and many bolt actions for many yrs.i want to reload for an colt hbar ar15 with 1/7 twist.i have imr4064 around but i'm thinking i may need something more like h335.i'm thinking because of the twist rate that i'll need a heavier than usual bullet like 60 grains or more.now the big question is about the dies.i want hornady but only rcbs sells small base reloading dies.can i get away with just full length sizing dies?or do i have to get the small based ones?whatever the type i get,i'm also going to get a lee crimper for crimping in a seperate step.any advice will be very much apreciated ty.