Jerry: If "bushing" is the "bolt lever roll" and yours is missing that part, then the round top bolt will likely be able to move up and down a bit when the gun is open. Could be the source of the "wiggle". The guys who thought through all this mechanical engineering had a reason for every part, so if that little part is missing, something ain't gonna work right and maybe that something is the top lever wiggles when the gun is open. Looks like a part a guy could make if one can't be found.
When I was trying to analyze what the designers had built, these were my thoughts about the bolt group
These six parts control many critical functions. The two screws simply hold the group so that it reacts as a single piece. The slot in the round top bolt engages the top lever. When the shooter pushes the top lever, the round top bolt moves forward and the square top bolt moves backward. This action allows the square top bolt to slide off the barrel lug and the barrels to hinge open . When the shooter closes the barrels, the top lever spring returns the top lever to position (slightly right of center when action is tight), the round top bolt moves backward and the square top bolt moves forward, engaging the barrel lug to hold the barrels and receiver tightly in place. The roll within the bolt lever facilitates the required movements. Because the two joined bolts do not move parallel, without the oval slot in the bolt lever and the roll, the assembly would bind and be defeated.
If any clarification can be added to that statement by any member, please jump in.
Cheers
Jack
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