The highest power scope i have is a 14x Mark 4 and I shoot at most 600 yards. I've bought a AR50 and plan to streach it out and thought of getting the 5.5-22 NF then noticed the 32& 42 power scopes. My questions is at what power are you wasting money because of mirage and other things causing you to back off to your min when shooting @1000+yards.