5.7 Johnson and M1 Carbine

[browningautorifle]

I use .223, 5.56 and 300AAC brass.

With some inside case neck reaming I would suspect? I made about 600 rds of 7.92 Kurz decades ago for a man with an MP44 and used Federal once fired .308. Had all the toys to work with including the inside case neck ream...