I use jebs or kicks. Indian creek makes a good choke as well. I shoot tss, so you can get a better shot density with the 8s or 9s you load into them. My constriction on my 500 choke is .665 and shoots a slightly larger than a softball size pattern at 40 with tss #9 2 Oz load. It shoots a larger pattern with lead but personally with lead I'd go .660. My 835 with the same load shoots a similar pattern with a .683 Carlson choke.