I use a Burris ballistic plex in the Fullfield II 4.5 to 14 . Not expensive but works great for me. Easy to pick up the animal and picks up light well. My last crosshair is at 600 and where my post goes from thin to heavy is at 720 yds. I shoot more then the average hunter and you have to. You need to know what range all of your crosshairs are at once you are set at 100. I am 2.3 inches high at 100 and use the main crosshair for shots @ 100-300 yds. Holding dead on. Sometimes I could use a little more Magnification, but anything over 20 power is tough to pick up animals when they move and then stop again.