Lots of different experiences leading to lots of different opinions. My experience, a lot of my shotgun shots are at the south end of a northbound coyote and #1 lead is just weak sauce for that. In lead, I don't like anything smaller than T and I consider that pretty range limited. My favorite lead load is F as it is more pellets than #4B and will still fairly reliable break down a coyote with a going away azz shot at 35 yards. That coyote will almost always need to be shot again, too.
I use almost exclusively HD and Tungsten though. BB in the HD, 2's, 3's or 4's in Tungsten.
But my opinion, good luck finding a coyote hit with a going away shot using #1 lead.
- DAA