I aquired a P345 a couple of months ago. I fired over 300 rounds of CCI Blazer Brass 230 Gr. JHP and it had operated flawlessly. Recently, I experienced several issues with the slide sticking back, which required a firm rap with the heel of my hand to break free. It was so far back that there was no more room to pull it back further. There are no markings to indicate where, or what is causing this to happen. Anyone have any idea what may be causing this issue?