05-21-2021, 04:30 AM
do a web search on the 9x39. the Soviets did this for subsonic applications decades ago. you could neck up a 7.62x39 case and fireform in custom chamber. you might call Manson Reamers or JGS reamers. they may have a reamer on the shelf already. i'm sure you're not the first one to think of this, not to be demeaning in anyway. lets just say great minds think alike :-) of course you'd need a barrel setup for it. Not sure if you're thinking bolt gun or AR platform. anything is possible of course.
-tdbru
-tdbru