Never really looked at it that way. I always considered it was to have two scopes zeroed for one rifle so that if your original scope crapped out you could switch scopes and be back in business... this actually saved me on my African trip years ago. Bent the tube on a scope and it was shooting way off... changed scopes and kept hunting....
Having one scope for two rifles would mean you would have to have the difference in adjustments for zero written down somewhere and adjust the scope when it changed rifles. Assuming the dials were accurate and everything went together solidly and accurately, I guess it could work, but it seems like a really big if.....
Bob
