Glaser Pow'RBall Handgun Ammunition 10mm Auto 135 gr JHP 1400 fps 20/box. This ammunition was designed to solve a very common problem that many shooters experienced while using semiautomatic pistols and revolvers: Large jacketed hollow point bullets were choked during shooting. Today Glaser Pow'RBall Centerfire Handgun Ammunition is one of the best defensive rounds in the world. Many people buy it for personal protection. It has many features which make it excellent ammo. For instance these jacketed hollow point bullets have an amazing projectile. Specifications for Glaser Pow'RBall Handgun Ammunition 10mm Auto 135 gr JHP 1400 fps: Manufacturer: Glaser Caliber: 10mm Auto Number of Rounds: 20 Bullet Type: Jacketed Hollow Point (JHP) Bullet Weight: 135 grain Cartridge Case Material: Brass Muzzle Velocity: 1400 ft/s Muzzle Energy: 588 ft-lbs Application: Personal Protection Self-Defense Package Type: Box Included Accessories: None Primer Style: Centerfire Package Contents: Glaser Pow'RBall Handgun Ammunition 10mm Auto 135 gr JHP 1400 fps Glaser PB10135/20: Pow'RBall Handgun Ammunition 10mm Auto 135 gr JHP 1400 fps 20/box