Since all my guns are vintage British or American and now, thanks to being a bit selective, pretty nice examples of the maker's art, I shoot them all the way I got them. Lots of the Brits are cylinder and full. The American guns are choked pretty tight in general. I use RST's or Polywad in all of them. I've used the spreaders in the tighter ones and haven't really noticed a difference in the number of birds in the bag. I'm not a serious clay shooter and I only shoot them for fun and tune-ups. If I kept score and a log maybe I could tell the difference but I just love to shoot them all.