12-11-2014, 10:07 PM
LRRPF52 Wrote:If we want to push the pressures, we definitely need a whole new upper receiver, barrel extension, and barrel tenon diameter. There are a bunch of guys learning the hard way right now about this with .473" diameter head cases stuffed into the AR15, pushing the pressures from 55-60ksi with only .136" wall thickness.
Which group of entrepreneurs is working through this? Have they experienced any KB's or bolt / extension failures? I'm aware of some new wildcatting going on, with some very aggressive expectations. I've not heard of any setbacks, though.