If you want a solid, dependable airgun - get a Diana! Germany has long been acknowledged as the airgun industry leader. And that's why Diana guns have a faithful international following of hunters, plinkers and field target shooters. Your Diana P1000 air rifle reservoir takes a max fill of 4,351 psi, but you can fill it to 3,000 psi if that's the max output of your fill device. You'll get fewer shots per fill than if you'd filled it to 4,351. A lower fill pressure does not result in lower velocities. Because this air rifle comes with a single-shot adapter, it can be used for disciplines where maximum accuracy is most important, such as field target. Remember to get a scope, as this air rifle doesn't come with open sights.