Leupolds are probably the most popular scopes by most people.. however I personally wouldnt use one as a damn hammer when you are talking about true long range shooting.. If I can find the article I will post it (or if somebody has it plz post it).. There was a company that tests light transmition through light that tested 100's of different scopes and optics.. light transmitions will tell the actuall usability at low light.. leupolds were at the bottom of the line, close to the $75 dallor bsa
.. although leupolds will take a beating.. just not the choice of hardly anybody that is serious about hitting targets at +1,000 yards
When you step into the realm of long distance shooting (with accuracy) your run of the mill scope just WILL not cut it.. really it wont.. not matter what you think
As nate mentioned.. nightforce is a great option, I personally own a couple and they are very nice scopes..
My latest purchase was a schmidt & bender... I'm very impressed with it, great optics with some of the clearest glass I have ever seen.. These will be on all of my long distance iron
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Another scope that I personally really like is the shepherds scopes.. This is what i replaced all my nikons, leupolds, and burris's on my hunting rifles with.. and once your get the reticle figured out.. are the quickest yardage acquistion shot I have found..