The Underwood Xtreme Defense Platinum 10mm Auto 115gr Solid Monolithic, 20-Round Box (brand part no. 940) is a 10mm Auto self-defense load from Underwood Ammo, built to stop a threat fast and feed reliably when it matters. Each round drives a 115-grain solid monolithic copper, fluted for hydraulic effect bullet. This is a straightforward choice for shooters who want concealed carry and home defense covered without guesswork.

Key Specifications

• The chambering is 10mm Auto, a proven defensive chambering for daily carry or a nightstand gun.
• The bullet weighs 115 grains, a weight matched to the platform for reliable expansion and controllable recoil.
• The bullet is a solid monolithic copper, fluted for hydraulic effect, a one-piece design engineered for maximum penetration.
• Because it does not expand, the bullet holds its weight and drives straight through for maximum penetration.
• The case is Nickel-Plated Brass, resisting corrosion and feeding smoother than bare brass through a pistol or rifle action.
• Each box holds 20 rounds, enough to load multiple magazines and still keep a practice reserve.
• Cost per round runs about $1.64, useful for budgeting a range day or a season of practice.

Frequently Asked Questions

Is the Underwood Xtreme Defense Platinum 10mm Auto a good choice for concealed carry? Yes, it’s loaded specifically as a self-defense round, with a bullet designed to perform reliably out of short-barrel carry guns.

Does the solid monolithic copper, fluted for hydraulic effect expand on impact? No, it’s a non-expanding, deep-penetrating design built to drive straight through rather than mushroom, which is the point on tough game or through barriers.

What is the case made of? It uses a nickel-plated brass case, resisting corrosion and feeding smoother than bare brass through a pistol or rifle action.

Buy the Underwood Xtreme Defense Platinum 10mm Auto

A defensive round only matters if you trust it, and this load is built to run when it counts. Browse more handgun ammunition while you shop, or add this load to your cart now. Order from our Lubbock, Texas gun shop and it ships fast to your door.