At 6.5 grain, the Laser is the world's lightest .177 caliber pellet! The light weight helps boost the velocities in light powered airguns. Due to the extremely light weight, this pellet may not shoot accurately in the medium or high powered air rifles. In fact, in some ultra-high powered airguns it can actually exit the barrel faster than the speed of sound and tumble in flight. Don't overlook these pellets for airguns such as the Beeman R7 or RWS Model 24. The Beeman Laser is also a good performer in both spring and CO2 air pistols