Sellier & Bellot Exergy Blue Bullet, Rifle Ammunition, 30-06 Springfield, 180 Grains, Lead Free Tipped Boat Tail, 20 Rounds per Box, 240 Rounds per Case SB3006XB New generation lead free bullets. Modern, highly efficient design incorporating a boat-tail base with a new, pointed tip for a flat trajectory and maximum retained energy. Blue plastic tip enhances expansion at all ranges while the solid copper construction maximizes weight retention.