How about a 311410 with a gas check shank. I’ve used some of the plain base ones and may still buy a lyman mold, but Id much rather spend the money on a 5 cavity NOE
I have thought about this and already committed to a different group buy for a 144 gr in this size for a mid weight .300 AAC Blackout to 7.62x39mm Russian . it may make it hard to get this group buy going with that group buy just closing on cast boolits that one just started production.