That's all my son and I hunt with these days. I shoot a Carlson's 575 non ported, and he's shooting a Primos tightwad choke . We're shooting hand loaded TSS #9 with Burris Fastfire red dots. I had them drilled and tapped for a mount. Both will put 500 pellets in a 20" circle at 40 yds. They are both bad news for turkeys and killed one a whole lot farther than you should be shooting at turkeys due to an accidental misjudge on yardage in open early season hardwoods. I never plan to hunt with my 12 again.
I can't help with the stock as we use the factory but think several used to use a sure shot thumb hole stock.