the space from the front of the bolt probe to the load port of the barrel will help you, you can do this by cutting a notch in the back end of the bolt where it contacts the cocking pin in the hammer. The notch has to be a few thousandths short of the current space from the bolt handle to the back end of the slot for it in the breech, if not the hammer will not latch behind the sear when the gun is cocked.
put in on the side ledge point forward and roll it in the port with a side and forward motion. works on the 177 and the 22 which is a little easier to do it with. i got one of these center point 4x16 scopes too, like it, as it moves the point of impact when i turn the knob. john
of a brass cleaning rod that i used on the 177 if a pellet went in wrong and wouldn't come out by bumping to stock with the heel of my hand. i insert it in the muzzle and elevate the muzzel untill it slides down the barrel and dislodges the pellet. some of the 177's would trip on the screw recess in the bottom of the breech. so far, havn't had that problem with the 22. john
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