I am an avid air gun shooter, and have been for many years. I recently got rid of most of my air guns, replacing all but one with the Umarex Hämmerli CR 20s. The CR 20s comes with a Walther 3-9x40 scope.

Living in Norway, there are some significant restrictions on firearm ownership, but one of the ways to get around that, is to be a licensed hunter. I will take the requisite course and exam this coming spring, and will be acquiring a rifle after that.

The rifle I am currently looking at is the Tikka T3 Lite .308 (Links version, though I don't suppose that should make any real difference).

I assume it would likely be a bad idea for me to use the scope off the Hämmerli on the Tikka (though I don't know that it would). What I am wondering is why (or if not, why not).