The Underwood Xtreme Defense .45 ACP 135gr Solid Monolithic (Underwood part no. 843) pairs a 135-grain Solid Monolithic with .45 ACP chambering for shooters who want personal defense and everyday carry. Underwood loads it to feed reliably from a carry gun and do real work on the other end. Unlike a hollow point, the Xtreme Defense bullet does not rely on expansion at all: its fixed flutes force hydraulic energy inward as it drives straight through, creating a wound channel without the bullet needing to open up. For handgun ammunition, this is a carry-and-forget load for the nightstand, the holster, or the range bag.

Key Specifications

• The chambering is .45 ACP, a proven defensive chambering with wide handgun and ammunition availability.
• The bullet weighs 135 grains, light for caliber, which keeps velocity and hydraulic energy transfer high.
• The bullet design is Solid Monolithic, a solid, non-expanding projectile that relies on fixed flutes rather than petal expansion.
• The case material is Nickel-Plated Brass, the slicker nickel finish resists tarnish and feeds reliably from a carry gun.
• The bullet is Underwood’s Xtreme Defense, a solid monolithic design that uses fixed flutes rather than expansion to create a wound channel.
• Each box holds 20 rounds, enough for a solid range session without constantly reordering.
• At about $1.68 per round in this box quantity, it is straightforward to budget for a training day or hunting season.
• The box ships at roughly 0.7 lb, light enough to make case-quantity orders easy to plan.
• This load is built specifically for personal protection, prioritizing reliable expansion and feeding over economy.

Frequently Asked Questions

What is the Underwood Xtreme Defense .45 ACP 135gr Solid Monolithic best suited for? With .45 ACP chambering and a 135-grain Solid Monolithic, it is built for personal defense and everyday carry.

Does this bullet expand like a hollow point? No, it is a solid monolithic design that relies on fixed flutes and hydraulic displacement instead of petal expansion, so it will not clog or fail to open.

Is this a good choice for concealed carry? Yes, the 135-grain Solid Monolithic is built for reliable feeding and expansion in a carry pistol.

Buy the Underwood Xtreme Defense .45 ACP 135gr Solid Monolithic

Carrying every day means trusting the round in the chamber, and this is the load built to earn that trust. Order from our Lubbock, Texas gun shop and it ships fast to your door.