Interarms Mauser Problems

[DavidJayUden]

Sounds like there isn't enough pressure to generate sufficient recoil to force it all to operate/eject. I'd be experimenting with slightly faster/hotter ammo. Feed ramp angle is voodoo and just doesn't seem like the culprit here.
Clean and polish the chamber.
Clean and over- oil the gun. Gun oil on your glasses is a good thing...
Grip it tighter. Lock the elbows.
Experiment with diff. ammos., SLIGHTLY hotter, faster, lighter bullets.
Don't jam the last round into the mags.
Main spring as a later resort.
Consider sending it to Tom Heller. Having the local gunsmith alter the feed ramp angle just might cause more harm than good.
Well, you got exactly what you paid for...
dju