Ultramax 10mm Auto 240 grain Jacketed Hollow Cavity Pistol Ammo 20 Rounds. This Ultramax Ammunition features Jacketed Hollow Cavity (JHC) bullets that deliver strong stopping power immaculate accuracy and predictability. With great promotions on Ammunition and other superior pistol ammo from trusted brands like Ultramax you re sure to find the ideal cartridge for your field or range use. Stock up today to save big on ammo and other top-tier tactical hunting and outdoor gear at OpticsPlanet. Specifications for Ultramax 10mm Auto 240 grain Jacketed Hollow Cavity Pistol Ammunition: Manufacturer: Ultramax Caliber: 10mm Auto Number of Rounds: 20 Bullet Type: Jacketed Hollow Cavity (JHC) Bullet Weight: 240 grain Application: Target Package Type: Box Package Contents: Ultramax 10mm Auto 240 grain Jacketed Hollow Cavity Pistol Ammunition What is Ultramax 10mm Auto 240 grain Jacketed Hollow Cavity Pistol Ammunition good for? The manufacturer suggests that it is best for target.Ultramax ULT-10MM-2-N: 10mm Auto 240 grain Jacketed Hollow Cavity Pistol Ammo 20 Rounds