my 220 does start to string after a few more rds but itl still keep them all inside 1.5"s and smaller even after 20rds or so through a barrel to hot to touch. i know this because one day i just started shooting and didnt stop. had to turn my scope down to see through the heat comeing off the barrel.
heres a coyote my daughter and i called in a few weeks ago. called it to about 50yds she was so excited so was i, usualy she isnt quite enough and they dont ever come in this close.
i spotted it from far enough out that i felt comfortable whispering to her and point out the coyote as it was comeing.
