This was shot with hevi-13 #4 shot 3 in mag. I was using a Cabela's superfull choke (0.665). It's okay out to 30 yards or so but past 35 yards the pattern starts to break up (as you can see from the pic).
BTW, I found a place online that sells the indian creek chokescheaper than anyone else (that I could find anyway). Check it out if you are interested:
http://www.midsouthshooterssupply.com/item.asp?sku=001050002