Hi there, I'm new, and have a problem. The best kind of newbie. I have a new to me G34, and it shoots like a dream. Most accurate glock I ever had. The last round out of a 17 round mag will not feed. Nor will the second out of a fully loaded 10 rounder. The 17 is an older unlined mag, but it fuctions fine with my G17. The 10 is a lined ban era mag. It also works great in my 17. This pistol worked fine for the last guy that owned it, I've seen him use it before, and it never had a glitch. The jam is the same every time, the slide comes forward, but rather than stripping a round off the mag, it rides over the rim, and comes to rest in the extraction groove in the case. Drop mag, pull back slide, and we're back in business. It's putting a dent in my fun. Any ideas? On Edit: Oops, thanks in advance for your time.