Just a different idea, lopers are very curious. Google using a white flag. Wavy it around, get their attention. Stop repeat.
Another little know trick, hide and seek. Walk right out in the open , then quickly drop, hide behind a tree or bush. Repeat. They can't stand it !
Might not work all the time but worth a try, may get one close enough.
Article: For a short window in the fall–late September through mid-October–you can lure a pronghorn with a handkerchief (a white T-shirt works, too). You’re appealing to the animal’s curiosity, territoriality, and herd dominance. Just wave the fabric until you get the buck’s attention, then lower your flag. Periodically raise and lower it to keep him interested and coming. I have my best luck when I tie a hanky to the barrel of my gun. That way I can raise the muzzle to get the buck’s attention without showing myself.
Waving a flag , can usually stop a running or moving buck. Giving a shot opportunity.