If you haven't replaced the mag springs with Wolff +%10 mag springs..please seriously consider doing so as well; the biggest wear item/things that needed to be replaced with regularity on mine, were mag springs. The springs didn't seem to last more than a few months for mags that were used or loaded and left loaded for carry. I would get misfeeds, bolt over base, etc issues until I replaced the mag springs with new ones, then it would go back to being %100. I started looking at replacing them every 6 months, earlier if I got a misfeed before then.
Barrel bump is definitely an issue, but if your misfeeds persist after your adjustments...look at the mag springs These things run so fast and the operating envelope is so small, mag springs take on a whole new level of importance, otherwise the slide outruns the mags...