Sellier & Bellot Rifle, 6.8SPC, 110 Grain, PTS, 20 Round Box SB68B Hornady PTS bullets differ from other plastic-tipped rifle bullets because they were designed to be a big-game bullet. The copper jackets used on the Hornady PTS bullets are thicker than the jackets used on varmint bullets, which aids in weight retention and assists in penetration.