Passport, exactly what battue advised do. I’m shooting 1 oz 8s. By about bird #75 I’m feeling it. I like the 1/2” with no cut stock. It will certainly be better.
BTW, how is a IM choke vs M for clays?
How fast are the 1oz loads you shoot? I shot a box of Fiocchi 1oz at 1290, I think, and it beat the crap out of me. Way more felt recoil than 1 1/8 oz 1145 imo. So my point is not all 1oz loads are the same. The 1145 stuff is always by far the softest shooting 1 oz load.
As to Mod Vs I Mod I like tight chokes and the confidence they give me but in the end you need to choke for the target presentation.
What kind of gun are you shooting?