[1911shooter]

I have had SIG's and lot of them, the only one i ever had this problem with was a P229, i would load a round out of the chamber and then top it off with an extra. when i fired the first round it wouldnt pick up the next. search it out, and found it was the mag replaced them and never had it happen again, and i have put over 15,000rds through it, since.
mikey change your mags and it should clear up.
Besides pennsy was probably talking to loud and his acoustic tone was throwing the precision macanics of a well refined machine out of wack. maybe he was looking to get more then $70.00 out of someone.