I have been shooting my Ruger M77 magnum in .458 lott today, and sighted it in at 50 yards for now. It is cutting holes at that range. I have a Leupold 1.5-5X20 VXIII mounted on it in Warne QD rings. I am using Hornady dangerous game 500 grain solids. I would like to know what range to keep the rifles zeroed. I intend to shoot at various ranges out to 100 yards, but now sure where to leave it set. May be a dumb question but i'm not sure. BTW I zeroed from a Lead Sled. I have been shooting open sights up to now offhand and from sticks.