Oberfell & Thompson in their penultimate work on statistical pattern analysis, 'The Vaguaries of Shotgun Patterns' pretty much said it all in the title. Its a tough read, statistics can be as much fun as watching paint dry. Counting pellet holes is at best, tiresome. Much more fun chasing that turkey, and it sounds as you have sufficient information to pattern no further. In the end it is confidence that makes the biggest difference, even when we understand that luck is also a factor. Knowing what your gun does with a dif loads and few patterns can provide added confidence ... or make you get closer;-)
Good luck! We are looking forward to seeing that beard photograph.