This is what i will be using on my cow elk hunt here in NEVADA. 7 mm stw 160 grain accubound/71 grains of 7828 at 3000 per. sec. I am a fair shot i shoot a little over 20 coyotes a year so i am not new to shooting but all have been under 100 yds. so my 0 is and has been 100 yds. What do you guys recommend for a 0 the area that i will be hunting is very wide open. Any and all help will be greatly appreciated. THANKS MIKE.