Just get a Nikon 600. That’s what I started with, and it worked great on muddy pigs and coyotes to 400 yards. Not 420 yards, but it would do 400. It would range non-muddy stuff like signs and trucks to 900 yards. I had it for years. I’d still have if 400 yards was enough, but I needed 500 to range the far side of my hay field. I bought a Sig 1250 to try. Sent it back and got a Leica 2000B. It’s great.
