I can't get this rifle to feed more than two rounds in a row without choking. I've had it out twice now and have tried Remington bulk pack, Federal bulk pack, and CCI Mini Mags and nothing will work in it. I'm convinced that it's not the mags as my mags work in a friends gun, but not in mine. I've heard plenty about the extractor problem/fix but I haven't seen this problem discussed. All I have is a not very good picture of the jam taken with my iPhone, so I hope y'all can see it. Any suggestions before I call S&W?