I also posted this on the 1911 forum. I have a new Custom Royal, and prior to today I had about 150-200 rounds through it. Today, while shooting my first magazine the slide stayed back almost every shot. I had to keep releasing it, and then set that magazine aside and continued shooting. Then It happened a few more times. I was shooting 230 LRN and 185 LSWC, all reloads. For some reason (coinidence?) it only happened with the LRN, and not with the SWC's. It happened with at least two different magazines, and the more I shot the fewer times it happened. I shot about 300 rounds today, and it happened about 4 times after the first magazine. Is this only a break-in issue, or do you think I have a problem I need to contact Kimber with? I also have two other Kimbers; a stainless Gold Match and a Royal Carry. Neither one has ever done this, however when the Gold Match was new it failed to lock the slide back on the last round a few times, but never locked back with rounds in the magazine. I appreciate any input from anyone who has experience this. Thanks in advance...Ron