I feel your pain, I had tons of jams when I had to use my stocker at the range and range owner was in the lane next to me and just shook his head. My stock Kimber magazine hasn't been touched since I upgraded to WC.I didn't buy any WC mags yet and just got a couple cheap ones from a member on another forum...they jammed on my very first event this weekend. I should have tested them out before but they came in literally right before I left. Everyone gave me crap over it too...