My project goal is to build a 'tactical repeater' setup rifle in a 22 cal cartridge. I have a Krieger 8 twist 27" MTU blank on the way. It will mostly be shot at steel/paper from the bench or prone/bipod so I don't mind a heavy barrel. I have a trued 700 in a McM A5a that I'll spin the 308 barrel off and have this installed on. I would like to set this up as a dbm mag fed repeater. I have a LOT of nosler custom comp 77s and 80s. My hometown range only goes to 200, but I have places in the woods that go to 1200. Accuracy is more important to me than hyper velocity. I was thinking 22-250 for feeding, cheap brass, etc. 22br is an option as I have dies and lots of brass already, but will it feed from mags? I do have a slow twist 222 on a 700 in an AICS that I could build on and this would allow 223 or 223ai. Thoughts? Thanks in advance.