Make sure the rings and scope are clean and free of any lube.
Torque it to 25" lbs then put a pencil mark on scope to see if it moves.
I've had hard kicking (45-70 guide gun with 40gr bullets) still move at that torque.
It could be the accuracy of my Fat Wrench, who knows if they are calibrated the same.
There is also likely some diameter variations between scopes and rings that could account for movement.
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