Just my.02 but if you're hunting southeastern whitetails and shooting 300yards I would keep the low end of your scope magnification manageable. In my opinion a quality 3-9x40 would serve you well. I know here in the woods of Ga. That deer will very often appear at 25-50 yards out of no where. Its no fun shouldering your rifle to see the lens full of brown fur from edge to edge not knowing whether you're looking behind the shoulder or at the rump. Burris has some rebates on the Fullfield 2s right now and they are really good optics. I have several that I have been using for over a decade. I also like their newer lineup the Burris E1. I purchased 3 of them within the last couple of years and they have been very clear with exacting repeatable adjustments and are very good in low light. The ballistic plex reticle is quite useful.