Sometimes with scope, it takes a bump or a shot to get the thing to move. Especially with spring loaded recticles like these. Sometimes you see people, especially bench resters, tap the covers to the scope adjustment after moving.

I would first shoot a group of 3. I know you don't want to shoot the ammo, but I sure don't move my scope based off one shot. Two, since you are on the paper at 50yards, take a shot at 100, and work off that. Shoot a group of 3 shots, and move, and let cool at least 10 min and then do it again.