Berry's Manufacturing Superior Plated Pistol Bullets .40 cal/10mm .401in 155 gr FP 1000/ct. They are more affordable than jacketed rounds and won't foul your barrel with lead.SAAMI MAX .40 COL = 1.135"SAAMI MAX 10mm COL = 1.250"Can withstand velocities up to 1250 fps Specifications for Berry's Manufacturing Superior Plated Pistol Bullets .40 cal/10mm .401in 155 gr FP: Manufacturer: Berry's Manufacturing Bullet Type: Flat Point Projectile Caliber: .40 Caliber Bullet Quantity: 1000 Bullet Package Contents: Berry's Manufacturing Superior Plated Pistol Bullets .40 cal/10mm .401in 155 gr FP Berry's Manufacturing 72953: Superior Plated Pistol Bullets .40 cal/10mm .401in 155 gr FP 1000/ct