I've shot a couple different loads with good results

This season I've been shooting some kind of Remington nitro 3.5"

Benelli Super Nova, Benelli modified choke. Good to a shade under 45 yards. Full choke splashed the pattern a bit and if you weren't DEAD ON it could have been a miss especailly inside of 25 yards.

If you are hunting open ground, I'd suggest a full choke.

I can check the specific kind of nitro and get back to you. Still, patterning a gun is a great idea, even if you just start w/ a couple suggested loads

The bird I got was ~38 yards in old growth timber with a bit of grass/brush. One bb in the breast, didn't even draw blood, I counted a good 8 holes the head and upper neck, including a couple that had to have about 3 pellets (one right behind the eye). Not including pellets in the feathery part of the neck. Bird didn't even flop.