I have a Marvel Unit 2, 22 LR kit for the 1911. I have occasion failures to go fully into battery. A light pressure on the back of the slide completes the last 1/4 to 1/8" of travel. Sometimes it is only a few thousandths from full battery, where the hammer still falls, but I get a misfire from a light hit. It happens 3-4 times out of 50 rounds. Marvel uses a Kart barrel, and I wonder if it is cut to match tolerances, and opening it up a little will help with reliability. Failures still happen after a thorough cleaning.
I had thought that maybe a Bentz finish reamer might do the trick, but I have an ejector staked on the barrel, so a thin reamer shank for a distance behind the cutter is necessiary for clearence. I don't know if a reamer is made that covers this.
Maybe someone has a better solution to this issue that doesn't require a reamer?