Don't really care for 69gr Matchkings out of a .223 for coyotes. Can't speak for the .243 variety. Most guys exploring the 69gr MK are doing so because they have a reputation for phenomenal accuracy but the same guys are also usually "hamstrung" with 9 twist barrels.
I've shot a few coyotes with them and have seen a few runners. Having shot a bunch of groundhogs and prairie dogs with the 69 MK, I've had the opportunity to inspect lots of carcasses.........
Usually what I see is controlled expansion type performance, not really what I'm looking for in a coyote bullet. That being said, the faster you push them the better they get! IMO, the 70 gr Berger VLD is far superior both "ballisticly" and terminally. It easily out-does the 69 MK and in the same twist barrels.
As far as coyotes are concerned, I believe it's had to trump the 70gr Berger VLD............For 8 twist guys the 75 A-Max is superior to both!!
GUNBOSS