I'm looking to get a 'fun' rifle to play with at the range and just general shooting. I am leaning towards a. 308 but not completely against other calibers. Who can recommend a good heavy barrel .308 in the $500-600 range? I am probably going to want to shoot some long distance with it as well, and put a vortex high magnification optic to boot.....i'm all ears fellas, and thanks for any valuable input.