Jeez.. thats gotta be what, 1 3/4 Dram? I havent tried but I had a couple ideas probably in combination that may help:
Weaker springs (within reason) and polishing contact surfaces.
Removing that mobile dustcover thing on the operating rod.
Heavy lightening of the gas puck may help, or perhaps a different geometry on it like those competition ones.
Another thing I dont know if it'd truely help but a weaker magazine spring may help reduce some friction on feeding. I do see this having a potential issue of the bolt outrunning the ammo in the magazine if the spring isnt strong en
