I have a lot invested in what I do, 3 grand for a rifle, 2 more in a scope and rangefinder, several hundred in bullets, powder and such, but I spend days in the field testing, looking for places where such shots are likely, and I get to shoot a lot. Its fun, its almost foolproof, if not for the wind its all simple math, I do not take a shot past 500 with winds over 10 mph. when its calm anyone can put the "X" on a deer at 600 yards and make it count if they know how much up is needed, you find that out by shooting a lot. once you have your drop chart tweaked to your actual trajectory its a no brainer, breathe and squeeze. I have taken 10 year old kids hunting, put them behind the rifle and they whack'em at 500 yards, the hardest part is calming them down prior to the shot.
RR