ok i have a nikon monarch african 1x4. i sighted it in on my 458 socom at a gunrange the day before hunting at 100yard zero spot on shooting about .85inch group. everything seemed fine. 24 hours later popped a whitetail doe poa shoulder round hits 5"right 5"down rear lungshot deer runs approx 100yds. confirmed gun is off 5x5" as above resight for 100yds. 2 days of bumping around in a four wheeler later take a poke at a doe 125 yds out poa shoulder poi 8 inches right in the spine even with poa. still light out reconfirm zero and weapon is shooting 8 inches right. i would think african monarch would stand a little jostling in a 4 wheeler. i think im gonna save up for a nightforce 2x10 for next year.