Lap the chamber with bore bright, then put a little bore bright on the locking lugs and open and close the bolt numerous times. Then clean all the bore bright up. Then take the spring out of the bolt and trim one (exactly ONE no more) link or ring off the spring, then reassemble and set the firing pin protrusion. iraqveteran8888 has a how to vid of this on you tube. I'll post a link. I followed it and it made my mosin's work like butter, no sticky cases, sticky bolt, etc.