Mauser,
I tried the old hevi-13's in #5 and they didn't pattern worth a hoot out of my 21" 870 w/ a .660 rhino choke. I got the best patterns w/ Winchester Xtended Range #5's. Excellent patterns out to 50 yards.Even at50 yards I'm able to get 4-6 in the brain/spine each time and about 20 pelets in the head/neck area.