The classic and prolly the best 30/30 mold is Lyman #311041 a 173 or so grain flat pt. gas check design that is accurate in all my .30 rifles. It however only comes in 2 cavity, for 4 cavity molds you could try: Accurate molds,Mountain Molds, BRP molds, NOE molds, LBT make great molds/designs and I know they make a 4 banger.....good luck on this project, a mold like the Lyman would make the best deer bullet for the 30/30 if cast to the right harness........Ben