Originally Posted by kyle milliken
well i did your nozzle test and sent my ?piston? in to my monitor so i think thats fine. gonna try sanding the rails a little see if that helps. maybe there's a little too much paint and the extra resistance is causing my gas efficiency to drop.
It's more likely that the slide is too heavy and the recoil spring is too strong. Try swapping it out or use a different slide if you have one. It doesn't matter how good the seal is if it requires the whole mag to cycle the gun.
We never did figure out why my friends kjw 1911 had the same problem but it's a common problem among kjw's.