i've been using 3" 12 gauge Dead Coyote loads on coyotes for about three years now. i consistently drop coyotes out to 70 yards using my full choke Remington model 1100.

i've never patterned those Dead Coyote loads: i just kill coyotes with them. However, IMO 15-20 #T sized shot in a 10 inch circle at 70 yards is not gonna happen. There are 54 shot in the 3.5" 12 gauge load and 50 T sized shot in a 3" 12 gauge load.