I have called in a LOT of coyotes, average distance is 85 yards and long side is 125. I have killed six coyotes past 450 yards in all these years, they were feeding on a dead cow. The vast majority, we called them in closer. Western states give longer shots at times, but even when we were calling in coyotes on p. dog towns, shots were never over 325.
On two occasions, we had coyotes just hang up at 750-800 yards in Wyoming. No amount of howling would get their interest.
When I lived in Az, we rode gaited horses and hunted coyotes off of them. I would howl, locate the highest numbers, and the Foxtrotter horses could cover 11mph easy. We would usually jump or see the coyotes, ride about 450 yards in the direction where the coyotes had come from, hobble the horses, and call the coyotes in easy. Coyotes NEVER saw the man on a horse, just the horse.
It is extremely rare to get long shots on coyotes. I would urge you to learn to call them in with a squeeker, lip squeak, or other hand call.
Of course, you may be Trolling for coyotes in your pick up. In Az, we "trolled" the fields that were being irrigated and the coyotes were up looking for gophers on the rows trying to avoid being drown. Shots were rarely over 350.
I zero'd my rifles for 200, held on the top of their backs for what looked like 300, tad more if range increased. Mirage and wind making shooting past 350 nothing more than a Hail Mary kind of shot. 22-250 AI and 22-243 AI are great cases for the longer range shooting with some knock down...you need flat shooting.
I would not dare use a 300 yard zero. I tried that shooting rock chucks in Idaho, screwed me up real bad! I have to keep things pretty simple as from the time you sight a coyote till the time he may disappear on you maybe nor more than 3-5 seconds at the most, calling them in of course.
Once in a while, a guy will get a long shot, but to think of picking up a range finder, shooting the range, consulting a drop chart, holding up a wind meter, all seems a bit delusional from my experience them since 1975.