I have a ruger 44 carbine gun show purcase/ money pit. Having problems feeding from mag to chamber. The slide / bolt locks open on every firing, the lifter latch un-latches when cycling a dummy round but latches back before the slide moves far enough forward to go past the catch at the rear of the trigger housing. It seems like a timing issue where the cartrige rim tripps the lifter latch but does not hold it unlatched long enough. Any help or comments appreciated.