What are you shooting ?
Steel IC,Light mod , Mod or improved Mod
Hevi shot IC ,Light mod or Mod
Tun. Matrex or Bismuth mod ,Improved Mod or full
You will have to pattern your gun /choke /load at different ranges ,every gun and choke is a little different.
NEVER shoot steel or Hevi shot thrue a full choke not labeled for it ,you can mess up the barrel and choke!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!