A while back I dug my old 512 out for a clean and test fire. Last time it was in the field was in late 90's .Jammed every shot .This time it was no different.
Finally a total tear down / clean revieled old varnished oil between cartridge stop and carrier . Detail clean these parts .The staked pivot screw is critical in the adjustment .
The screw is supposed to be tightened fully ,then backed off 1/4 turn .
But that's just close .
This screw tightens the resistance of the two pieces ,so adjusting until the fit is tight but the carrier can pop up at correct timing.
Once confirmed the pivot screw needs to restaked by center punch metal into slot.
Working perfect now.
Finally a total tear down / clean revieled old varnished oil between cartridge stop and carrier . Detail clean these parts .The staked pivot screw is critical in the adjustment .
The screw is supposed to be tightened fully ,then backed off 1/4 turn .
But that's just close .
This screw tightens the resistance of the two pieces ,so adjusting until the fit is tight but the carrier can pop up at correct timing.
Once confirmed the pivot screw needs to restaked by center punch metal into slot.
Working perfect now.