New to the site and this is my first post. I cannot believe that I am writing this as I thought this would never happen. I was at the PD range shooting today. I've had a Taurus 1911 for 10 months or so. My carry gun, not duty gun. I've put about 500 rounds through it with absolutely no failures. I was shooting today and switching between my Glock 40 and 1911 45. A firearms instructor asked to shoot the 1911. I know the guy real well and he is an expert shot, 98 percentile. Tac guy and quite knowledgable. Well unbeknownst to me he loads up my 1911 mag with 40 cal rounds. It goes bang but fails to cycle. I'm thinking what the heck, I've never had a failure with this gun. He cycles the weapon and fires, same thing. Again, same thing. I finally look down and see a split and expanded 40 case. :-[ Great. I look the gun over, cant see any damage. I test it with the RIGHT ammo. Gun fires 45 from there on, no problems. no failures. Is there anything I should worry about? What do yall think? I cleaned it thoroughly and checked the barrel with a bore light. No scratches in the lands or grooves that my eyes could see. The chamber looks ok, feed ramp is not scratched. Any suggestions besides loading my own mags for anyone who wants to shoot it in the future would be appreciated.