Master Class shooters - that can attain / and even better, retain that registered target shooter classification -- are all very accomplished shooters...with a lot of talent !
NoSecondBest deserves a lot of credit for his accomplishments..and certainly has earned the right to his opinion / and sharing what works for him.
The highest class I ever obtained was class B.../ and on the way up to that middle of the road level, when I really learned how to read targets, and to make adjustments in my hold or break points - after a miss / was when I really learned the game and understood shotgunning techniques.
I will say - at that point - changing chokes made less of a difference than I originally thought / but for many of us - working up thru the classes - D, C, B, A....are a little different than the shooters that make it to Master or AA classes.../ and as long as you don't let changing chokes consume you and divert your attention from reading targets, watching the other shooters on your squad...then I still think its ok.
On my primary squad ...we had one Master Class shooter...and in practice, letting him talk about how he was reading the targets...and what his "shot plan" was for this station ....then watching him shoot ...and then shooting behind him in a rotation with the other 3 guys / made a bigger impact on my limited ability ....than anything else I was trying to do.
Make friends with an accomplished shooter at your local club - especially one who is willing to share a little bit of their time ...it'll pay off big time in your success and enjoyment...in sporting clays, or even Skeet and Trap as well.
And if there is a Master Class shooter around /that is willing to let a new shooter into their squad when they have room...take the opportunity !