Well, this is just my $0.02 but I learned to turkey hunt in 1975 while stationed in Ft. Lee, VA with the US Army. My gun was a circa 1921 Ithaca® Lefever™ Nitro Special™ first-year production 16 ga, with 28" barrels choked M&F.

I loaded the left full choke barrel with Federal® Magnum 1¼oz #6 Pb. The right barrel was stuffed with Federal® Magnum 1¼oz #2 Pb. That was an ABSOLUTE TURKEY SLAYING COMBINATION!

The left full choke barrel was an ABSOLUTE 40yd killer! A couple of times when the range was stretched I knocked the bird down only to have him get back up and skedaddle! That was when my right Modified barrel barked with#2 Pb. That ALWAYS put the turkey's beak in the dirt. It is a viable combination for those of you that can still use it!

Where I currently live in WA state we are limited to #4 and smaller shot size. As I am long in the tooth, 71, I use a 20ga Mossberg® loaded with Winchester® Longbeard® 1¼oz Pb #6 up the pipe. The tube is filled with a hoarded stash of Winchester® Supreme® 1¼oz #4 Pb.

It works...