Fixed full is best choke for both results, and mind. IMO. After the first miss, the thought is usually, "I should have used a different choke." Then the next miss occurs because you are thinking, instead of concentrating, and it all goes downhill from there.
I use Briley IM's for everything, any distance..screw'em in and forget it and just practice...if an IM can smoke them in protection shoots I dont think going tighter can make more smoke as long as I hit it in the first place
I use Briley Spectrum chokes in my Blaser. I am using an extra full in my Unsingle and will never take it out. Currently shooting a winter wobbles trap league. In my over and under barrels I am using a light full and an extra full. When registered season gets here and will be shooting doubles I will use an Improved cylinder for the first shot and either a light full or a full for the second shot.
I shoot practice and handicap with a Briley Extended Extra Full Invector Plus. (In a Browning XT.) I use this choke because it patterns absolutely beautifully and, as has been said, tells me whether I am on the target or not.
I shoot competition singles with an Improved Modified of the same brand.
I think we all can agree that to shoot 100 whether it is singles, handicap, or doubles. Mean perfectly pointed targets 100 of them. That means no matter what choke you use if it is a perfectly pointed shot the target will break.
Yet the Majority of AAA 27 AAA shooters use a full choke. I wonder why that is???????
I disagree that you must point perfectly 100 times and that chokes do not matter.
You can be a little off and/or get lucky that one or 2 pellets on the fringe of the pattern hit the clay at the right point and you get a chip. Chokes do matter, in that you do not want to be unlucky and point perfectly but not have the clay break because of too open a pattern.
You practice with a tight choke to hone your skill. You open up so that you get that fringe hit when shooting tournaments. When you get to the point that your practice scores are the same as tournament scores, you leave the tight choke in.