I have used a factory Stoeger turkey choke, Carlson TSS. 555, and Carlson Longbeard XR .568. The TSS choke was just too tight with Apex #9 loads for mine. I also had mine drilled and tapped and have a cheap FF knockoff on it. It is one of my backup guns, but is capable to 40+.
I will add that with Apex loads, this little gun kicks worse than any other gun I own, including magnum rifle calibers! Worse than a 3.5" 12 ga, so it is not a kid friendly gun with these loads.