Here is by far the best I have found for under $450.00. In fact these work so well for me I have 5 of them mounted on a 7mm Rem Mag, .308, .223, and a .338 Win Mag. All hold zero I can dial up or down for shots and all shots so far have been repeatable. The turrets match the reticles and have 80 MOA's of elevation. You can go here to look at them and then Call or send Matt an e-mail and tell him I sent you. Web site is
http://www.sightwonders.com