The extended length choke tubes pattern buck shot better due to the extended forcing cones. My Remington Spartan would not pattern buckshot with any of the stock tubes. I bought a Trulock extended .670 turkey tube which works well to 40yrds with 4 and OO buckshot.
Trulock now has buckshot specific extended tubes.
There are lots of other good and maybe even better extended tubes on the market today.
