#html-body [data-pb-style=MADBTQG]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll}Made from 17-4 heat treated stainless steel, these chokes are for shotguns using the Browning Invector Plus choke system. Steel, Lead, & Hevi-Shot may be used in all constrictions with the exceptions listed below.No Steel shot larger than #BB or speeds exceeding 1550 fps should be used in choke tubes tighter than full.No steel shot larger than #4 allowed in the Turkey constriction