12 Gauge 2-3/4
Plenty of killing power if you keep the distance practical. I'd pattern them to see where the group centers so you can adjust accordingly if needed..
I have never turkey hunted before and decided to get a permit for this fall. I too will be shooting 2 3/4 in 12 ga,#4's..............that is all I have other than #6 that I use for grouse....will see if I get a shot and if I do what it does....
You should be just fine with a 2 3/4" 12 gauge. I would try Federal Grand Slam 2 3/4" #6 and Winchester Rooster XR 2 3/4" #6. The Federals have 1 1/2 ounces of shot and will probably have a more dense pattern in a more open choke. In a tighter choke, the Rooster XR with 1 1/4 oz. of shot may do a little better. The Rooster XR has a muzzle velocity of 1300 fps and will hit harder, but that means nothing with a poor pattern. If they both pattern similar, then go with the higher velocity.
I shot this bird late yesterday morning with my 20 gauge Mossberg 500TK at 34 yards. I shoot Long Beard XR 3" 1 1/4 oz #6 @ 1000 fps and he barely flopped after I shot. His head was mangled. If a 20 gauge will do it, a 12 with the same or slightly larger payload will be just fine! My dad shot the other bird about two seconds after I shot mine.
The only thing that matters is the number of pellets in the kill zone. Like others have said pattern, pattern, pattern....
Walleye beef, great bird! I think calling them in is the fun part!
Don’t worry. Call your bird within range and put the pattern on his neck! You will not be disappointed