I recently rebarrled a long action flat back, from 06 to .243. I am having trouble getting the bolt back, unlocks fine, but have to smack th ebolt handle to get her back after 2-3 round. Headspace is tight, and gun shoots the lights out with my old standby load, guys help me figure out what is up. I cleaned the chamber, and barrel, good for 3 rounds, then tight again. I scrubbed it with foaming cleaner, then polished the chamber with #0000 steel wool on a drill, have not tried since., I did see light circles on the brass, nickel plated brass. This gun shoots in the.3's with a pencil barrel factory barrel.