I wouldn't mind if my scope shifted a certain amount at a certain temp. I could easily cope with that.
I tested my Mk1 Big Nikko back in the summer and found that it over ranges by upto 7 yards!!
This ocurs when it gets to 25 degrees C.
But to cut a very long story short, it also over ranges whenever the scope and air temp are more than a couple of degrees different!!?
Yesterday - First half of Cornwall's club, all was well.
Second half - In the lovely warm sunshine and out of the very slight wind it began to over range by 5 yards.
Air temp 18 scope temp 24.
Now, I can easily grasp the concept of heat expansion causing internal parts to expand and shift the ranges, but I'm still trying to get to grips with these other symptoms
Does anyone else notice these weird symptoms?