Trulock Choke Tube EXTENDED BLACK FINISH WINCHESTER/BROWNING/MOSSBERG TRULOCK PREDATORÖ 12 GA SPECIAL TPWIN12SPL Predator/Varmint Chokes Our suggestions on chokes are as follows. Mossberg 835’s and similar .774 bore shotguns .710 exit diameter Browning Invector Plus and similar .740 bore shotguns .680 exit diameter Remington and similar .730 bore shotguns .670 exit diameter Beretta Optima Plus and similar.733 bore shotguns .683 exit diameter Benelli Crio Plus, Mobil style and similar .725 bore shotguns .665 exit diameter We suggest the below loads Hevi-Shot Dead Coyote (T Pellets) Win Xtended Range HD Coyote (B Pellets) Number 4 buckshot In any given shotgun you may find one load patterns tighter than another. You will have to pattern your gun to find the best load. Predator™ Choke Tubes At the 2015 SHOT Show we introduced our Predator™ style of choke tubes especially for # 4 buckshot and the large pellet predator tungsten loads. All of these are made in a 4 inch overall length with a longer (3 inch) than normal conical section for less pellet deformation. All of these chokes have a nominal .050 to .060 constriction based on average bore size for each specific model.