that suggestion was probably made back when you could'nt use slugs for hunting. N.J. here back until the late 70's or early 80's you could only use buckshot for deer and bear if there was a black bear season then. the remington boxes suggest #1,2,3,4, 0,00,000 buckshot for deer, black bear suggest 0,00,000. and they even say on the box for best results use a FULL choke. larger than #4 buck will not spread right in my 870 using a full tube. i would only use slugs,0 or 00 buck if that all i have on hand.