You have to try these in your .177 single-shot rifle or pistol! Deep penetration and so easy to load! The Gamo Round is designed for penetration and use in repeating airguns like the Gamo P-23. Especially easy to load when timing and repeat shots count. It was especially developed for field use, when you can't always take the time to align a direction sensitive pellet. This round ball is not for use in BB guns.