Lorne; I have used the Swift to slay coyotes for many, many years, and it's always an "iffy" situation. A couple of bullets that I have had success with staying inside a coyote are the Speer 52 grain HP and the Sierra 50 grain Blitz. Here are the problems, though. The 52 Speer has a rather large opening, which means the BC is not as good as many other 50-53 HP's
The Sierra Blitz occasionally comes apart in the air at Swift velocities. Almost any bullet will sometimes exit a Coyote broadside. If your shot is Quartering or head on, even the 50 Ballistic tip will often stay inside. I even tried 55 grain FMJ's a number of years ago before they became taboo in BC. and I found they often left exits as big as expanding bullets unless you lowered the velocity a fair bit, and AFAIAC, high velocity is what the Swift is all about. If I want to launch .224 projectiles at lower velocities, I will shoot my 222 Remington, or even my 22 K-Hornet. Regards, Eagleye.