I dont normally do much shooting in the cold weather, however, my recent coyote hunts have caused me several trips to the range at temps of -10C or so.. On three separate scopes, I noticed erratic scope performance. Typically, the scope would jump 4-5 inches after an adjustment of 1-2 inches. Or the scope would adjust poi much less than the adjustments indicated.
In the most sensational example, after a large adjustment (c/w tapping the tube) the scope caused the shots to walk horizontally about 8 inches across the paper.
Two of the scopes were relatively cheap Tascos (World Class Plus), however, one was a Bushell 3200. All were known to function properly before these cold weather exercises.
Has anyone encountered this before? I presume the adjustments are some type of spring loaded ratchets that are affected by cold weather. Aside from the obvious remedy, anyone have any suggested fixes?
In the most sensational example, after a large adjustment (c/w tapping the tube) the scope caused the shots to walk horizontally about 8 inches across the paper.
Two of the scopes were relatively cheap Tascos (World Class Plus), however, one was a Bushell 3200. All were known to function properly before these cold weather exercises.
Has anyone encountered this before? I presume the adjustments are some type of spring loaded ratchets that are affected by cold weather. Aside from the obvious remedy, anyone have any suggested fixes?
