Underwood Ammo XTP ammunition in 10mm Auto (brand part no. 243) is a hunting-handgun load built for deep penetration on tough game. Underwood Ammo backs this load with the quality control shooters expect from a name they already trust. At the heart of this load is the 180 gr bullet, matched to the 10mm Auto platform shooters already run. In our handgun ammunition lineup, this is the Underwood Ammo load built for that job.

Key Specifications

• The caliber is 10mm Auto, a caliber that has taken game across North America for generations.
• The bullet weighs 180 gr, sized for the terminal performance this load is built around.
• The case is Nickel-Plated Brass, the standard for reliable extraction and smooth reloading.
• Muzzle velocity is rated at approximately 1300 fps, for authoritative energy on target at practical ranges.
• Each box holds 20 rounds, enough to work with before needing to reorder.
• Cost works out to about $1.19 per round, affordable enough to shoot as much as you train.
• The box ships at approximately 0.83 lbs, worth knowing before you check out on a multi-box order.
• This is a centerfire cartridge, ignited by a replaceable primer rather than a rimfire priming ring.
• The XTP (eXtreme Terminal Performance) jacketed hollow point is engineered for consistent, controlled expansion across a range of velocities.

Frequently Asked Questions

How many rounds come in a box? Each box holds 20 rounds of 10mm Auto.

Is the brass reloadable? The case is nickel-plated brass, which handloaders can typically resize and reload for repeat use.

Buy the Underwood Ammo XTP 10mm Auto 180 gr, 20-Round Box

Grab a case if you shoot it regularly, or a box to see how it patterns and cycles through your gun first. Order from our Lubbock, Texas gun shop and it ships fast to your door.