I generally zero at 15 yards Then do a walk back drill from there, and walk in from 15... ( walk back drill is every 2-3 steps fire a shot) so 15 yards 18 yards 21 yards 25 yards 28, 31, 34, etc. Ooh, and if running two different bullet weights, I do that with each one. 15 is super easy to confirm a zero with 1-3 shots after flying or driving a long way to a match.