From what I have searched and found the match chamber is a little shorter than a non match chamber and when you insert non match ammo it actually forces the bullet into the rifling which could cause the bullet to pull out of the brass leaving it hung in the chamber if you didn't shoot it and unloaded the bullet. I have shot the mini mags and the velocitors made by CCI and haven't seen any problem. Which I have shot all of them and haven't tried to unload one. I haven't shot enough of them to really tell about accuracy. but what I have seems to be pretty accurate. I was hoping to get a answer from T/C, But all I got was a recording. I tried to call back and got through to a person and she informed me she couldn't transfer me to someone who could answer my question because of the number I had called and gave me a different number to call back, So I called that number and got what sounded like the same woman who listened to me state my question and then she hung up on me. I thought maybe we had got disconnected so I called the same number back and she answered again and then hung up again. I don't know what is going on with the woman answering the phone, But I called back the phone number that I have used before for T/C and left my name, phone number and my question today at around 1:00 oclock eastern time on the voicemail for gun service which was option 2. Wonder how long It will take for someone to call me back?