I'd like a little input. I have a medium range (600-1000 yds) rifle chambered in .30-06. I have an opportunity to pick up a Bausch & Lomb model 4200 Elite Rainguard scope to put on it. The scope is 6 X 24 with a 40mm objective with target knobs and a duplex recticle. The asking price is only 1/4 of the list and the scope is new in the box. Any one have any experience with the upper level B&L scopes?