Thanks Air. That did the trick. Bobby said I need to load the bolen/SV mags and let sit for three days. If that doesnt work, change out springs, rinse and repeat. Z40, yes the sti tubes are really hard to load and only getting 15 or 16 with dawson guts and grams basepad. Ordered some grams guts for the sti. The grams basepads barely go on the sti mags (metal prong tough to get in)