Nice! Great to see the old girl up and running.
I'm with Erich on the shotshells. Ive had good luck with BB and and #2's on foxes out to 50 yards, but coyotes are a lot bigger, so you need more penetration. On the other hand, their vitals are small enough to miss with holes in pattern. You won't have a lot of pellets, so pattern density makes the 20 a close range choice for me. In my 16's, buck shot patterns would limit my coyote shooting to 35 yards or so, with BB's I'd stay with that maximum range.
Bfly