Most .22 scopes are setup for 1/4" per click at 100 yards, see photos:
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That's 4 clicks per inch at 100 yards, or 8 clicks at 50 yards.
If for some reason your scope is 1/4" per click at 50 yards, which would be very odd, but 1/4" at 50 yards would be 1/2" per click at 100 yards, or 2 clicks to the inch to go from 50 to 100 yards.