Chokes are not like paper or plastic but more personal like blonde, brunette or red head. In this case near, mid range, far or midrange with quick reflexes or far with slow reflexes. It's style, intended use and a very personal choice.

I have set up long barrel guns with different chokes like .015 and .025, .020 and .030, .025 and .040-.050. For all around use I do very well with the .015 and .025 combo. For barn pigeons, on windy days, I reach for a Lefever I have which is .025 and .050. It kills them at any range I can manage to hit them at. I have smoked several at an honest 55+ yards and the feather storm looked like low eight on a Skeet field. Awesome and scary at the same time but worse from the pigeons side.