I have a Ruger M77 Mark II, in .30-06. I've pushed it out to 375 yrds before, just for fun trying to hit a dollar bills through washington's face way out there taped to a milk jug (a buddy agreed to supply the bills as long as I guaranteed to hit them!!!!). I only have a tasco 4-16x glass, so I can't see much past a quarter mile, but I've been thinking about kicking up for a leupold in higher power, maybe get one up to 25x. How far can I count on my accuracy from this gun. I'd like to begin hand loading 3000+ fps shells to attempt to put some out accurately past 600 yrds. I'd like to get better than 4-6 inch groups at this distance, but I'd love to asassinate some more dead presidents (sorry george) at this distance, is this unreasonable???