Berry's Preferred Plated bullets! Bullets are swaged then copper plated and re-sized (Double-Struck). This low cost alternative to copper jacketing provides a bullet that is inexpensive accurate and best of all does not lead the barrel! Berry's does not research or publish the load data but you can use any published load data for a jacketed or lead bullet as long as it is the same weight bullet. Berry's bullets are designed to withstand velocities up to 1250 fps unless otherwise specified.