it looks pretty good. i haven't noticed any bolt thrust problems with the 6.5 or feeding problems with a properly sized case.
more case volume that could help. i figure if the DOD ever goes with a new round it will probably be a slightly longer 6mm hagar cause it will works better in belts than the short cased 6.5g--
something like a 6mm hagar +5-6mm length.
what kind of speed will this make out of a realistic barrel length like a 20" or 16"?