4-16x50 F2. I know it's not a popular opinion, but I just don't like F1 scopes for hunting. If your using an atacr, then your dialing for distance anyway, so reticle sub-tension is irrelevant anyway. If your far enough away that you are going to be making windage adjustments, you'll probably be at max mag anyway. Just my personal preference. That being said I don't carry either of my atacrs anymore, my Zeiss v6 3-18x50 goes hunting with me, 11 oz's lighter and has taken any and everything I can throw at it.