Don't buy Hevi-Metal BB loads for coyotes! The BB shot in these loads are just steel shot. The Hevi-Metal shot in Hevi-Metal loads are just a little denser than steel, they are not as dense as lead and they will be much smaller than the steel BB shot.
There is no Hevi-Shot that is denser than lead in Hevi-Metal loads.
Steel shot does not even compare to lead shot for penetration and energy. Steel shot slows down way faster than lead shot or denser than lead shot.
I just put a bunch of different shot types and speeds into my KPY Shotshell Ballistic program. I am sure this program is not 100% accurate but it is pretty close. All of these loads but the last three have 3.50" of gel penetration. They say you need 1.5" of gel penetration for ducks and 2.5" of gel penetration for geese. My guess is 3.5" of gel penetration is close to what you need for coyotes.
Make sure you look at the speeds of the steel loads and the target ranges. The Target ranges tell you the distance of the gel penetration.
Tests #1 and #2 show the big difference between steel shot and lead shot, even with the steel shot going 250 fps faster than the lead shot.
Tests #7,#8 and #9 shot types will be close to what Hevi-Metal BB load performance would be.
Lead #2 shot will hammer a bobcat and it will kill a coyote if you can shoot it in the head, neck and chest area. But lead #2 shot is not a good coyote load. A good coyote load should be able to break down or kill a coyote even when the shot angle is not good.