Have a 100 yard range. With a new Rock River AR type gun, just trying to save ammo so probably start at 40-50 yards so the round is on the paper and then move back. Just iron sights now so will probably sight it in as about an inch high at 100 yards for now.
With a new rifle I will start at 25 yards and get my zero, then move to 100 yards. If I did it right I should only have to change my elevation not considering any wind adjustments.
If you wantto save on ammo. Buy a >22lr upper or conversion for it.
An even better solution would be to give me the AR. I’ll make sure no ammo is wasted and the OP won’t be tempted to shoot it too much if he doesn’t have it.