I need to know for sure what type of choke tube fits my 12 Gauge Browning B80-SL, so I can order a new screw-in-choke...It is a Browning B80-SL, [superlight]. All I have is a Cylinder Bore choke tube. I think I want a .665 XX-full Choke tube to shoot at turkey shoots [paper] and for high flying birds. I have been told by some that the extra full and XX Full won't shoot any tighter on paper than a plain full choke. But card shooters and block shooters use tighter chokes. Any ideas? Facts? I am sure several of you know the answers....Thanks ahead of time!