Haendler & Natermann Excite Smart Shot with 0.177 Caliber Copper Plated Low Richochet BBS Excellent for plinking/Ideal for CO2 Pistols/Revolvers Content: 500 BBs Pellet Caliber/Weight: .177 Caliber / 7.4 Grains For air pistols / rifles with a minimum muzzle energy of 5.5 ft.lbs