Good evening. Having a problem I’m hoping some if you gunsmith types may be able to help with. I recently purchased a Mossberg 590 Shockwave. Cool gun, but it’s prone to malfunctioning due to a trigger issue. Shooting Winchester 2 3/4”, 7 1/2 shot heavy loads (only load I’ve tried), the trigger hangs up about every third shot. And by hanging up, I mean it can’t be pulled even a little bit. No movement at all, so it’s not like the safety is engaged where you can still get a little bit of movement. BUT... if I release pressure on the trigger and pull it again it will fire. Crazy, I know, but that’s what it does. This has been the case on two separate range trips, one before cleaning the gun and one after a thorough disassembly/cleaning. I’m unable to replicate this by dry-firing, it’s only when firing live rounds. I contacted Mossberg and was told to blow out the trigger mechanism with canned air and also to try another type of ammo, and if that didn't fix it then the gun would have to be sent in for inspection/repair. In the meantime, I thought I’d see what help I might find here, or if anyone here has ever heard of such a thing. Will mention that I have a Model 500 that I’ve owned for over 20 years and have never had an issue of any kind with. Thanks!