i have a 1944 m1 carbine made by Saginaw that I'm having a issue with and hopefully you guys can help out. When I fire the gun the boot doesn't go far enough back to pick up the next round. I've recorded the action in slow mo to see what's happening. 95% of the time it only goes half way back enough to eject the use casing but I've had it stove pipe a few times also. I've used monarch ammo and some old soft point ammo I got with the carbine. It does it to all my mags (2 15 1 30) it came with a usgi recoil spring which I replaced with a Wolff. No change so I got a better condition ushi and still no change. Cleaned out the gas port and still no change. Any ideas?