Just started reloading 40 cal s&w. Shooting px4 storm subcompact. The slide will not come completely forward after each round. Happens with both old and new brass. Also tried lead and fmj bullets. Have tried col from 1.10 to 1.125. Slight crimp and tighter crimp. Lighter loads and heavier loads. Nothing seems to matter. Using hs-6 powder. Factory rounds work just fine. Any suggestions? Showed my reloaded rounds to experts at local reloadind department. They did measurements and said they looked fine.