I use mostly 4.5-14 Leupolds in the Vari X III or Mark 4 scopes. I have often wished I had a 2X setting way more often than I have the need for 14 power. My scopes never go higher than the bottom end setting unless I'm looking at someting far off and want to see it a little better. All of my coyote shooting is done on 4.5X. A 2x-7x scope is ideal, your 4x scope will work just fine out to your shooting distances.