Underwood 10mm 155gr XTP JHP 20rd Box

Underwood Ammo 10mm Auto 155gr XTP Jacketed Hollow Point — Handgun Ammunition. This loaded 20‑round box supplies 10mm Auto cartridges intended to deliver controlled expansion and terminal performance.

The primary purpose of this ammunition is to provide a consistent, supersonic defensive and hunting load for firearms chambered in 10mm Auto. It is presented in nickel‑plated, boxer‑primed, reloadable brass cases and uses a jacketed hollow point bullet profile to manage expansion and energy transfer.

• Caliber: 10mm Auto (10 mm)
• Bullet type: XTP jacketed hollow point (JHP)
• Bullet weight: 155 grains
• Muzzle velocity: 1500 feet per second
• Muzzle energy: 775 ft·lbs
• Case material: nickel‑plated brass; boxer‑primed and reloadable
• Rounds: 20 rounds per box (Boxes per case: 10)
• Ballistic coefficient (G1): 0.137; Sectional Density (SD): 0.138392857142857
• Rated supersonic and listed as safe for use in a suppressor

Specifications & Construction
The projectiles are described as being made from brass with a jacketed hollow point profile and contain lead. Cartridges are loaded in nickel‑plated brass cases with boxer primers, permitting reloading. Dimensional packaging data provided: 1.40 x 2.50 x 3.15 (inches). The load is reported to use flash‑suppressed powder. No power source or action applies beyond standard centerfire cartridge operation.

Compatibility & Intended Use
This ammunition is intended for use in firearms chambered for 10mm Auto. Typical applications cited for this load include personal defense and hunting, and it is suitable for range use and defensive duty setups when a 10mm pistol or carbine is specified. It can be used as a primary defensive load or paired with a suitable duty or patrol configuration where 10mm is the service caliber.