I was hoping some of you 1911 experts could/would diagnose my problem with my pistol. Here are the facts: 1) Rounds through pistol to date: 1,500 2) I'm a left handed shooter 3) Use Wilson 47d magazines exclusively 4) Just replaced the slide release with a Wilson sl 5) The plunger tube is not loose 6) Have a brand new recoil spring (18lb) After the first couple hundred rounds the pistol ran 100% Since the first of November I've experienced the slide locking open on the last, or next to last round. The last round is just sitting there loose in the open action. Folks on the 1911 forum offered some solutions....one was to change out the slide lock....which I did. "Experts" told me that changing out the sl would fix 95% of these kinds of problems. Well.....maybe not. Mind you, I ran 100% for over 1,000 rounds....the failures started recently. I'm using new Wilson magazines. I intended to carry this pistol and recently sent the pistol to Novak and had night sights installed. I'm VERY frustrated at this point having these issues. Maybe I should stick to Sigs and Glocks.... Does anyone have any other ideas on what can fix this problem? Thanks for any constructive advice...... Wanna kill these ads? We can help!