When my Father died he left me with a Sako AII chambered in 22-250. It has a Leupold Vari XIII 3.5X10. Serial number says it was made in 1984.
First time I fired this rifle it shot an 18” group 😳. I took the scope off and instantly found the problem, my dad had over tightened the rings and crushed the scope tube front and rear, I sent it in to Leupold and they replaced the tube and had it back to me in 2 weeks. I guess they still have some parts for 35 year old scopes. Great CS