I'm shooting a Winchester model 70 in 7MM Rem Mag, and during a shoot, I will go through an easy 100 rounds. The scope I have (Tasco) came with the rifle and works well enought, but after 30 rounds or so, seems to begin rolling in the rings. I tighten them down - often, but I suppose I need to upgrade anyway. Let's keep it under $200.00; I'll need rings, too. I shoot at 100yd now but want to move out toward 2,3,4,5,etc., so I'd like a scope that can move with me. Thanks for the input. Terry