Thanks for the follow up. So basically, you have a new 940! I’m glad it’s “running like a dream” as I’m currently where you were. The service guy I talked to at Mossberg said they couldn’t fix mine with 940 parts as those parts are dedicated to 940 production. Don’t know if that’s true or not but 3 weeks ago, that was the company line. Mine has no particular fps threshold. It’ll fail to feed 1290 Rem 0 buck and feed 1145 Fed LE 133 00 (8 pellet)fine. Then, turn right around and not feed 9 pellet 1145 Fed LE 132 00. So, saying I’m lost is indeed, an understatement. I added the MST and had no measurable improvement. 1 previous Rem 1250 FPS 1 buck shell that did not feed did indeed feed all 5 this session. I’m calling Mossberg Tuesday following holiday to see what they’re willing to do. I’m sure I have some recoil issues going on that they didn’t check last time I sent it to them. Just not feeling good about have to pay for followers, pistons, plunger, etc just to get it right when they have the parts and know that’s a problem with the 930’s. Again, thanks for your response and happy shooting.