Those are great numbers at 40 yds. I wonder what the 5s are doing at 40. Never could understand why manufacturers choose 5s as the only shot size available for the 20 ga. Sixes match the payload better and will penetrate as far as the pattern will hold together. Makes no sense at all to me to load a shell with a pellet that will penetrate to 60 yds but run out of pattern at 35, as is often the case with lead 5s.
I actually think fives are the better choice in a 12 gauge throwing 1.75 to 2 ounces of them, but not in the 20 with its 1.25 oz payload.