You know an AK-74 spring may do the trick! Good call! I'll have to try one to see if it behaves any differently as I don't want to go cutting on springs just to test a theory. I may also file on my magazine locking lug to adjust the height of a loaded mag downward a little bit to see if it helps any. The upward pressure of the magazine spring may also be causing too much drag.
Gunco Member #10
The "original" Boltcutter Rivet Squeezers:
Project Pink - the Pink and Blue AK-74: