If you want the best scope, check out
US Optics. They are better than the Europeans, expensive, and superior to Leupold and other big Amreican brands, which use Japanese lenses made from Chinese glass. If you want a scope that is trusted by the USMC, and which is so rugged it can withstand being used as a club on concrete, US Optics is for you.
100% made in USA. There may be a wait of a few months for your scope.
For learning about reticles and ranging, read "The Ultimate Sniper."
Don't forget to tell them to take out a loan for any scope from U.S.Optics. I agree, THE BEST OPTICS anywhere, and expensive, but definitely worth the money.