I just got back from the range where I was shooting my way-cool HK P7. After running 4 mags through it with with no problems , I slide-locked empty, popped in a fresh magazine, squeezed the grip to shoot the slide forward, sighted on the target, gently pulled the trigger and....nothing. No trigger resistance at all, all the way back.
I couldn't figure it out at first, but upon examination I realized that the slide was about 1/8" from being all the way forward and into battery. Try as I might I could not rack the slide back - it was well and truly jammed. I had to bring it home with a live round stuck in it.
I put it into a bench vise (with wood jaws) and eventually got it racked back and the round ejected. The case had gouges in it, especially at one point from the extractor (I think), but I'm not sure that the case is a 9mm Luger. (I reload from picked up brass)
Rather than saying 9mm Luger this case's head stamp has: A tiny plus-inside-a-circle symbol, "W C C", and "02". That's it.
Dimensionally I can't see any difference by eye between it and a sample 9mm Luger reload. I measured with a micrometer and came up with the following:
Case OAL: Luger .749 WCC .741
Diameter at middle of case: Luger .385 WCC .385
Diameter of rim: Luger .388 WCC .387
Diameter just above groove: Luger .391 WCC .394
The profile of the groove and shoulders looks slightly different between the two.
Any idea what the "WCC" case is, if it's 9mm Luger why it's not headstamped as such, why it jammed my pistol?