Originally Posted by Xadion
and the timeing of the cocking rod is usualy not needed- it changes how much overall back travel your bolt has- makeing sure it clears the breach- as well as how much your back block is screwed into the pump arm
usualy the cocking rod back set screw can remain untoutched
This is not the purpose of the cocking rod adjustment nut.
There should be absolutely NOTHING preventing the bolt from ram full extending out. This will only result in a painful snapping of the ram arm or a stripping of the back block.
The purpose of that entire part of the cocking rod is to make sure that the Hammer is brought back the correct amount from the backblock. If the nut is too far forward, the hammer will be brought too far back, and the lug will slam against the rear end of the slot. This will end up tearing up the body, as well as most likely destroying the ram arm, pump arm, or back block. If the nut is too far back, the hammer will not be taken far back far enough for the lug to catch the sear, and when the bolt is returned forward, it will just go forward with it. This will end up in such a way where the marker will not fire correctly, and will general result in stacked balls in the barrel, and then breaks.