Your entitled to feeling that way that is what makes hunting great we all get to do it a different way.
I have shot targets at 50-60 yards I don't have 10 inch circle counts but I can tell you your not putting a turkey head anywhere in the center of the pattern without the turkey being killed. I have shot roughly 30 turkeys prob a few more that is what I can think of and only ever not killed 1 distance did not play a factor as i simply missed when trying to double. That seems like a good ratio but maybe you guys get them all. I will always struggle to believe #7s give you any advantage based on my years of turkey hunting if they work well for you at the distances you shoot then I am glad you have found a set up that works. I am simply saying from my gun w a hevi shot choke tube at 50 yards the center of my pattern will kill a turkey 99 out of 100 times nothing is ever certain. Not that i'm advocating it and have never personally shot a turkey past 55. i feel a full load of 2.25 ozes of 5s give me a better opportunity at killing a bird past 55 yards 100% no and that is the reason I have passed on shots at those ranges in the past.

If I mistakingly judge a bird for 55 and he is 65 I would rather have #5s in the gun than #7s admitedly maybe this thinking is off and #7s are a better choice. I realize we are now talking about distances most should probably not be attempting as they are not 100% with any set up I am simply talking in hypothetical as stated earlier

0-50 yards 100% of turkeys die with 5s or 7s out of my set up maybe others dont have a tight enough pattern and need the added pellet count of 7 shot.

Beyond 50 yards the percentages are higher with 5s IMO than 7s and I think this is where we differ in opinion and thats ok we will agree to disagree and we also both agree that these are ranges most should not be taking shots at however in the event that it happens I would rather have a load of str8 5s than a blend and only having 1.5 or less oz of 5s.

On that note maybe it was a complete fluke and the pellets magically found the correct place but this season I was a witness of two birds attempted to be killed at 65 and longer and both times the birds where taken at those ranges the closer of the 2 right at 65 almost flipped the bird over. I do not believe the same result would have taken place with #7 shot but I could be wrong.