Berry's Superior Plated Bullets are bonded copper-jacketed bullets. Starting with a swaged lead core, they are electroplated with copper to their final weight, leaving no lead exposure. They are then re-struck to precise specifications, ensuring a solid bond and providing consistency with every round. Indoor range safe and unbelievably accurate. This is a Hollow Base Flat Point-Thick Plate bullet. Cartridge Name: 40 S&W Cartridge O.A.L.: 1.125" Max Velocity: 1500 fps Cartridge Name: 10mm Cartridge O.A.L.: 1.250" Max Velocity: 1500 fps Load data for Berry's Superior Plated Bullets can be found in any manual or on any powder manufacturer?s website Cast or jacketed data with the same grain weight and profile will work with their bullets You can use a taper or a roll crimp Don?t over crimp the brass after seating. This causes bullet core separation, leading to increased copper fouling and accuracy issues Don?t exceed the recommended maximum velocities listed. This creates bullet core separation and accuracy issues