I have a 590 and 500 ATP 12ga shotgun(s)I am having the same problem with both guns. Upon attempting to chamber a round from the magazine, some of the rounds just fall out the bottom loading port,also on the 500 sometimes the rounds wont even come out of the magazine onto the elavator?? Anyone experience any problems like this, if so let me know what you have done to remeidy the problem...Thanks !!