My saiga, using the stock mag, will jam on the first or maybe second round, the bolt ejects the spent round, starts to feed the next round 80% of the way (maybe 1 1/2" left until it would be closed), but the bottom of the bolt scrapes hard against the top of the next round and pushes it forward enough so it's nose starts to rise out of the magazine and jams the gun. I'll see if I can bring a digital camera with me to the range and see if I can take a close up of it when it happens, and of the top of gouged round from the top of the magazine.
I've cleaned the gun thoroughly (especially the mag