HEVI-Shot Hevi-XXI, 410 Bore, 3 Chamber, #5 Shot, Tungsten Pellets, 25 Round Box HS54105 Loaded with HEVI-Shot's original 12 g/cc tungsten that's 53.8 percent denser than steel, these loads double the downrange energy, hitting birds harder from a longer distance. This means you can drop three shot sizes for the same lethality and still put 28 percent more pellets on target.