Federal designed their Grand Slam specifically with one thing in mind to deliver tight patterns of hard-hitting shots on target, at maximum range. Grand Slam ammo utilizes Federal's Flitecontrol Flex wads that open from the rear for controlled release of pellets, resulting in extremely consistent patterns. Flitecontrol Flex wads function equally well in standard or ported choke tubes. Concentric, copper-plated lead pellets, cushioned in an advanced buffering compound, fly true to retain velocity for maximum striking energy, and dense patterns at long range.