I got one of the new Custom 1991 A1's in stainless with the Videcki trigger. The gun has proven reliable and accurate. At least for the first 300 rounds that is. It now has a problem with feeding jams. I've been using 230 factory ball ammo and the rounds get pinned to the feed ramp when the slide comes forward. Pressing forward on the slide does not help either. Is it the mag? This problem is now occuring with alarming regularity. What is going on here?