Well, I picked up an old Mauser rifle Saturday and it has an old Weaver K6 on it. The scope is in really good condition for its age. Glass is nice and clear and the adjustment functions seem to be working just fine. The rifle has been re-barreled to 243 and sets in a really nice Fajen stock. Completely bedded from front to back. The scope just seems to "fit" the little rifle but is the older model with non zeroing cross-hairs. So when you look through the scope, the vertical cross-hair is a little off center. My question is, should I upgrade or leave it alone? I really like the looks of the old scope on the rifle but I know a better scope could improve performance.