I have a Kimber Gold Match converted to 10mm. It works well 95% of the time. However every other mag or so it feed jams towards the end of the magazine, typically with 1 to 3 rounds left. I am not sure what the proper name for this type of jam is. The nose of the cartridge is at the entrance of the chamber and the slide has closed on the body of the case with the case head under the slide. I have a 24# recoil spring in the pistol. What I think may be happening is that the action is cycling too quick and the magazine spring is not pushing the next cartridge up fast enough for the breechface to grab it. I do not think the pistol is short cycling as it has never failed to lock back on an empty mag. I am going to try some extra power mag springs but was curious as to whether there were other thoughts. Thanks.