Depending on the caliber, Hornady Custom handgun ammunition is loaded with Hornady XTP, FMJ-RN, XTP Mag, FTX or FP (flat point)-XTP bullets.Hornady produces most of the brass for Hornady Custom pistol ammo. All other brass is selected to ensure it meets our unusually high standards for reliable feeding, corrosion resistance, proper hardness and the ability to withstand maximum chamber pressures.Powders in each cartridge are loaded to ensure optimal pressure, velocity and consistency from lot to lot. Each primer is matched to individual loads, and specifically selected for their ability to quickly, completely, and reliably ignite the powder chargeSpecifications:Cartridge: 40 Smith & WessonBullet: 155 gr XTPProduct Line: CustomSectional Density: .138Ballistic Coefficient: .137 (G1)Box Count: 20