I just bought a new gun, an SX3 20 in bottomland. It has a 26" barrel. Now that I'm going to be using a 20 what constriction and shell combos can I try to get the best results. I'm interested in the federal heavyweight 7's and the longbeards, not so much in hand loading or any TSS 8's or 9's. I'm not sure those are legal shot sizes here in Indiana. If you have any ideas something that's working for you please share it with me.