100 in the 10'' is a good pattern.
But to evaluate your combo(load/choke) I suggest percentages.
30 to 50% in the 10" at 40 and 70 to 100% in the 20" at 40.
To evaluate maximum range I suggest 100 in 10" and 1.5" penetration.
yours is plenty adequete but you may find a better one.