If you experience failures to feed again you should try to isolate them to a particular magazine. If it happens with the magazine that has the +1 extension and not the others, it may be caused by lack of spring tension or the protrusions of plastic at the front of the feed lips slowing the feeding. If you can isolate it to that magazine I would remove the +1 extension and see if the problem continues. If it happens with all of your magazines, the problem is likely not caused by the magazines.
You might try different ammo. I use American Eagle and Speer Lawman for range ammo and neither have ever caused a problem in my G23 and G27.
G23 G27 .40 S&W Club Member# 4520
Stay safe, stay Second Amendment!
Last edited by voyager4520; 10-10-2012 at 15:35..