I agree just get one and you will see if that is the issue or not.. What color paint is on the .45 cal. springs you have? are they all the same color.. I think the org. .45 mags had black paint on them and some had issues. S&W has changed out the springs with another color paint on there upgraded spring best as I can remember.. Not sure if it was red or orange.. This was going on with the FS M&P .45.. I have one that's a safe queen and it does have two mags with black paint on the springs.. Just some info I thought may be useful to you.. George