**This scope reticle did not have something that all snipers use with modern-day sniper scopes, Mil Dots. Mil Dots give you an accurate unit of measurement and a way of compensating for gravity and wind drift. Without them, it can be extremely tough to hold for the effects. It is an odd scope by today’s standards. There are no internal adjustments to zero these old style Unertls. The scope adjusts with turrets integral to the rear scope mount, and the tube of the scope floats inside adjustment pins.**
https://loadoutroom.com/7356/the-carlos-hathcock-sniper-rifle/
The Carlos Hathcock Method of Sighting in a Rifle.
A good read.
A little more about who Carlos Hathcock was.From MGySgt USMC (ret) Gus Fisher