Pattern it!
Seriously though- I shot trap for 2 months with NO choke... I was using an old Ithaca with a poly-choke and I had it completely set up wrong. It was effectively a cylinder choke. My best was 14 and it was VERY annoying because I'd miss targets and just wonder what the heck happened. Once I patterned it the world became clear- and the mod was the best! If your pattern covers the clays at the ranges you hit them then that's the one to use. Mod chokes are not created equal- manufacturer and shell will have an effect on the pattern you end up with.
Seriously though- I shot trap for 2 months with NO choke... I was using an old Ithaca with a poly-choke and I had it completely set up wrong. It was effectively a cylinder choke. My best was 14 and it was VERY annoying because I'd miss targets and just wonder what the heck happened. Once I patterned it the world became clear- and the mod was the best! If your pattern covers the clays at the ranges you hit them then that's the one to use. Mod chokes are not created equal- manufacturer and shell will have an effect on the pattern you end up with.