jiggs jr.,

Personally I dont think you have a problem. I owned a 500 way back and when firing slugs the action would open and all but eject. I contacted Mossberg and they explained it this way. The Mossberg gas system is designed so that as soon as the gas pressure is low enough, the slide will disengage. Basically so as fast as you can pump you can shoot. When you use it on the rest and do not have your hand on the slide, you realize, when holding the foreend, you are jamming one in for a second shot and dont notice how quickly it releases, only from a bench or patterning. And with the kick from a 3 1/2 the recoil is making the slide work which tells you how fast the gas clears and you can chamber another shell for a second shot if necessary, but then none us need a second one! [8D]

Hope that helps, IMHO I do not think you have a problem, but if you still feel it is serious, give Mossberg service a call.... always got good help from them.

Jeff