Rhino Choke, Nitro loads, end of story, end of turkey
I have a 95 SBE which I converted to a Turkey Gun.
I hate to promote an individual company, but I have played with several chokes and loads on the patterning board and this is your answer, without any question.
Get the Rhino .673 choke that is specific to your gun.
Then buy the Nitro 3.5 load, 4.5.7 shot, that is specific to your gun.
When I patterned this load I got between 60 and 78 pellets in the head of a turkey target at 40 yards.
No other load/choke combination ever patterned over 20 pellets at the same range.
They cost 4 buck a load. It's the best dollar you spend turkey hunting.
you will get acceptable patterns at 60 yards. I don't advocate shooting at this range, but when I had a wounded bird up against a fence at that range my 3rd round dropped him without flopping.