Does anyone know which choke I use for slugs? I have heard Improved Cylinder (IIII) and the website here says to use a Cylinder (IIIII). I have an I. C. choke but not a Cylinder. Do I need to go buy a new cylinder choke or will my improved cylinder work? I would love to try a shooting some slugs but really don't want to damage my baby. Thanks for your help and input.