Yea, thats what I'm useing. A Mossberg camo turkey 12 guage. It came with an XXfull choke, but you can't (shouldn't) shoot buckshot through it. For buckshot I spent $12 on a "full" choke a Walmart. Improved cyl. choke works great for small game, but would spread out your shot a bit much with the bigger stuff.
So I was thinking, either #4 turkey loads through the XXfull choke, or #4 buck through the full choke should be ok for coyote, but I could use a second opinion. Maybe from someone who has called a few in?