Looks like the throat on the Midway barrel is too short to allow the 168 gr RCBS to be seated out far enough to keep the gas check in the neck of the case. I also am having a feeding problem from magazine to chamber with the boolit seated to chamber at the current throat length. Can the throat be lengthened by hand using a throating reamer, or does a lathe have to be used to keep it lined up with the bore? I see I can rent a 7MM throating reamer from Elk Ridge, but I wanted to make sure it is a job that can be performed manually.