I have had a few rifles recrowned. I have found several from the factories that were not cut straight. (another reason to buy custom barrels). It could have been caused by a loose brush on the cleaning rod and the threaded part bumped it on the way back in, not likely but could happen. The process will be to insert a pilot of the correct demensions in the barrel, chuck the barrel in a lathe and center on the pilot, remove pilot and recrown the barrel. There are some hand tools that will do the job at home, I am not familiar with them and have never tried one. The cost should be around 50.00.
