I shoot the 70gr matchkings but don't coyote hunt. It puts big holes in turkey and does well on small deer. On deer with a perfect broadside shot it won't exit if the range is too close, at about 150 yards it will leave a 50 cent exit hole. I haven't shot anything past 200yds except paper so I don't know for sure what kind of expansion you would get. I load the the matchking on top of a max load of varget in a couple 243's and had no trouble getting moa in sporter barrels. In my experience the 70gr matchking expands more like a big game bullet than a varmint or FMJ, if your hunting coyote past 300yds you might want a varmint bullet just to make sure you get enough expansion. I really like these bullets but I no longer use them for deer, there are much better bullets for them. If your getting a good buy, I say snatch them up they are good bullets and would work well out to medium range on coyotes IMO.
Dave