I shoot pigs all the time at two thousand yards acrossthree roads and never had a problem. You just need to practce!

If your seriously shooting across the road you need to stop. It's just not worth the risk. Even if it's a seldom traveled road.

I also think you need to get a range finder. I think you will be suprised at how far 600+ yards really is with a rifle. I consistantly make 600 yards shots everytime, when my target is Mother Earth.