Thanks for the input and sorry to start a s**t storm over "some" and "many". An informal sporting clays shooter, my limited experience is some change tubes on virtually every station and many never change from one end of the course to the other. I've decided to go with .005 and .010, boring but open enough for grouse hunting in heavy cover yet enough choke for open shots over a pointing dog. I may have mentioned I'm an avid handloader, if the patterning board disappoints me I can always make up some spreader loads. And to those that suggested a more British choking choice, I did consider wide open and full. I've got a couple friends that are deadly with this set up in the open country but I do have other guns for that occasion. Remember, my goal was a dedicated forest grouse gun.
