quarterboring...............Don't lead with your chin and you won't get punched in the face.
Listen, I don't know how far you are from Lewiston Idaho, but if you're hunting the wide open sage in WA you'r probably pretty close. I'm a Range Officer at a nice little range out of Lewiston. We have a gong set up at 530yrds. Why don't you come on over and we'll spray paint a 6" circle in the middle of it and you can demonstrate your ability. You can shoot off of a bench instead of the hood of your truck (while at the same time being careful not to knock the speaker off of the roof of the truck), so this should be a piece of cake for a man with your abilities.
Heck I'll even give ya a free pass to the range. PM me and I'll send ya a map. We're only open Fri., Sat., and Sun. but some of the RO's get togeather and shoot on the off days so I'm sure we can accombidate you.
Let me know when I can expect ya.
Thanks