I tried to resist putting in my 2 cents.
I get beat up SOOO Bad when I do.
But here it IS and It's what I get and do...
I use home rolled Lead "F" with "Steel" powder 3" 1 3/8 oz. and 3 1/2" 1 5/8 oz. 870 supper express. Dead coyote extended ported .669 choke.
The 3" run at 1500 fps and the 3 1/2's go 1350.
I pattern at 60 yards and on a paper plate I always get 10 to 15 pellets in the plate.
At 70 yards close to the same like 8 to 12 . It will rock and sock a coyote ...