I have a new SR1911 I took to the range last week. In the first mag I had 5 of the rounds stovepipe, I took it home, cleaned and oiled it and took it back to the range today. The first mag shot with no problems, the second mag started the stove piping again. I used Chip McCormick mags, and shot Winchester white box ammo through it. I've emailed Ruger about it, waiting for a reply, just wanted to see if anyone else has had this problem. My other 1911's have no issues using this mag/ammo combo, only my SR1911. Any suggestions would be helpful.