We have shot size restrictions here
Nothing larger than 4 lead #2 steel, or #4 non toxi v shot other than steel
I've always approached turkey guns as a speciality/dedicated gun.
More of a rifle than a shotgun, A turkey gun IMO should throw the tightest, most dense pattern it is capable of. And should wear some sort of sight, other than a bead. I prefer a red dot
I've patterned my turkey gun out to 60 yards and as close as 10.
While I have no intention of shooting a bird at the far extreme, I'm a realist and understand that sometimes birds hang up, and if I've traveled 6-8 or more hours, and get a bird to hang up at 50-60 yards I have full confidence that a shot on a bird who's neck is extended at that range Wil result in a dead bird
