Berry's Superior Plated Bullets are swaged and plated to final weight and re-struck for accuracy and precision. They are more affordable than jacketed rounds and won't foul your barrel with lead. Berry's Superior thick plated bullets are designed for shooters who push higher velocities the thick plate allows the bullet to handle up to 1500 fps.SAAMI MAX .357 Mag COL = 1.590SAAMI MAX .38 Spl COL = 1.550Can withstand velocities up to 1500 fps