I recently got a Glock 21 and shot it with some 200 gr lead semi wad cutter with 4 and 4.4 gr of Bullseye. Ran like a champ. I pimped it out with a 6 in Wolf barrel, 4 port comp, tungsten guide rod 15 lb spring, Hunter mount and slide ride. It's that Carver custom package. Shot it the first time tonite. It was a jam o matic. Several times wouldn't go into battery (barely). Only ejected properly a few times out of thirty rds or so. Some didn't eject, others stove piped etc. Is the load to light for the recoil spring? Seems the mount caused some jams. Any help appreciated.