H&k usp 45 expert disappointment first time out.
I picked up my h&k usp expert the other day and went to the range with mag tech jhp, pmc 230gr ball. For some reason when I fired the mag techs the pistol would fail to complete the cycle I.e it would eject the fired casing,cycle a new round, but the slide wouldn't go all the way forward. I would have to push it with my thumb. A couple of times it wouldn't even fire the new round and when I tried to clear the chamber it was really hard to pull the slide back. Any advice what was causing this.