meketrefe
.450/400 Nitro Ex
Meke, I think you should undertake a project perfecting the .300 Blackout.
IMO with the 7.62x39 (hybrid 308 bore chamber) this makes a lot more sense.
The 7.62x39 will launch a 110gr to 2,600fps. 250fps faster than the blackout.
Very simple. No need to do anything special. Simply get one and reload.
Another very nice one is the 7mmx39 based on the 7.62x39. This is even better
and will put that speed in a 120gr SST or solid.