Testing has shown that filling your Marauder air rifle to no more than 2,600 psi (179 bar) may deliver the greatest accuracy. We recommend trying different fill levels between 2000 and 3000 psi to determine the optimum fill level for your own rifle. Each gun is different. A chronograph is the best way to determine optimum fill levels for precharged pneumatics (PCPs). *The owner's manual does not show the correct weight and length for this rifle. The owner's manual states this about fill pressures: "The Marauder has been factory set to an efficient fill pressure that will suit most hunting and target uses." If you're left-handed and need the bolt moved to the left side of the rifle, please add that optional service to your cart when you buy your gun. Helpful resources: Learn about hunting with air rifles Tips for picking the right airgun for hunting game & pests Learn about airgun hunting laws in your state Shop related categories: pellet guns, pellet rifles