No need to go over 10x for the distance OP mentioned. Extra power useful for seeing groups when sighting in but that's what a spotter (glass or person) is for. The B&C reticle in the Leupold lineup is the cat's meow; simple and very effective. Has numbers on it so when the brain gets foggy you just look at the number on the side of the reticle to know what hash mark to use. I hate it when a reticle has no numbers. In the heat of the moment, one has to stop, count down the number of hash marks and still use the wrong one. The way to go is either a reticle with numbers on the hash marks or a scope which will dial the yardage you want (CDS, MOA, MIL), makes no difference as long as you learn to use it and use it well.

Alan