Quote Originally Posted by HES View Post
Thanks. Her stance wasn't bad, but it wasn't great either. So that is something I worked with her last night.


Once round gets partially fed into the chamber, the second one follows it and gets the bullet portion wedged between the bottom of the top round and the top of the chamber / ramp. This is an illustration I just whipped up that shows whats happening.



Normally I'd agree with you but this one has me stumped. Only the one type of ammo double feeds. Its got me scratching my head unless it is the ammo.
I've not had that type of double, but that's better than the type where the round gets jammed in the gas tube.

Either way I'd say it's the mag 99% of the time like others have said. But to have one type of ammo do it and another not sure is different. I'd go with measuring the ammo like has been posted......