The Federal Premium loads start with the finest primers, which are subjected to more frequent inspections for dimensional tolerances and charge weight to ensure they deliver consistent ignition for every shot. Next is the propellants, which are specially formulated to meet Federal's stringent specifications. These clean-burning powders are of the highest grades in the industry. They're consistent and reliable. With high-quality bismuth pellets with a density of 9.6 g/cc, Federal Bismuth payloads pattern and hit birds like traditional lead, providing more killing power at longer ranges. The material is also softer than tungsten and steel, allowing use with older shotguns. The loads FLITECONTROL FLEX wad tightens patterns and increases lethality over comparable steel loads.