I will take a look at the screw...it seems to have plenty of spring but a check is definately good advice, thanks. There does not seem to be alot of firing pin protrusion at first check but this gun appears to have an inertia firing pin so just looking at it "fired" wont really tell. It doesn't seem right that the unfired 410 shells can move back and forth when the cylinder is closed...but I cant believe S&W missed that bad on the headspace. I will check those things when I get home this evening and report back. Thanks again so far.