I bought a Wilson mag the other day for my STI Escort, so far I've got about 150 rounds through the mag and 400 through the gun. The factory mag that came with it has been perfect but every so often while using the Wilson mag the slide will not go into battery. It stops about 1/4 in. to short. Has this happened to anyone else? The store I bought the mag from also had KimPro mags with the metal round follower like my factory mag. Would those be better? I have used Wilson's before in commander sized 1911's with good results, maybe I just got a bad one. Can someone shed some light on this for me.