Well the TSS used to be thought that a little more open chokes gave the best pattern, and while they do seem to give a great 20" spread, but now that more and more guys are reloading TSS, more are trying tighter chokes and achieving some incredible 10" patterns. So it's really up to the individual what you want in a pattern. Some like the more spread out 20" pattern, instead of the tighter 10" numbers, but some tighter chokes are putting up both. It's just depends on the choke and load your using I would say.