Thanks guys,

Yes it is one click for 1" at 100 yards. It is an old scope (I' m guessing from the late ' 70' s). I know I should be sighting in at 100 yards, but I' m on crutches and thought 50 would do.

I downloaded the ballistic tables last night and if sighted in at 100 yards, the 150 grain is off by 0.1 at 50 yards (so it' s negligible).

I am a real rookie at adjusting the scope and your answers have helped greatly. I have no idea why I' m so far off this year, but good thing I checked before I hit the bush. Back to the range for some additional work!