BW

I just picked up an SBE II and am interested in trying some 3, or 3.5" hevi-shot through it (if there is such as thing as 3.5" hevi-shot). Does anyone know if the no-tighter-than-modified restriction on shooting steel through choke tubes is the same for Hevi-shot? In other words, could I shoot Hevi-shot through the full choke tube? Thanks, Ben