Not to highjack this thread, but would full choke be adequate for turkey hunting?
You bet. I've killed a gang of turkeys over the last 30 yrs using nothing but fixed full choked shotguns.
Just pattern your fixed full with different shot and ammo brands to get the most pellets in the head,neck area of the turkey target out to about 40-45yds.
The 'specialized' extra full turkey chokes will get you a better pattern at a longer range but are no means a 'have to have' for turkey hunting.
You just have to get the bird in closer to ya.
The downside to the extra full turkey chokes is you better have that bead set right on that turkey neck at closer shots. In close, patterns are tight enough its easier to miss.
Far as gun selection goes, there's many times that you'll cover a lot of ground turkey hunting. I like a lighter shotgun for this reason. These hills get longer/steeper as the morning wears on. The very reason I like my single shot.
As far as between the 12 and 10ga., I've never turkey hunted with anything but a 12 and 16 but I'd suspect the 10 full may give you more range than the 12 full, but that's just speculation on my part.
I'm sure someone with 10 ga turkey hunting exp. will chime in.