I'm looking at buying a viper 6.5-25x50 pa riflescope. #1 I like a fine cross hair. Will I be disappointed with this on for varmints out to 800 yards. and maybe further? #2 Will I be satisfied with only 20x magnification? It's a price I can live with, and the quality sounds good. I will use it on a 308 with 20moa base, for groundhog hunting and some match shooting out to 500 yards. Opinions please!..... Oh, what rings? Also looks like turret adjustments are in inches not minutes.