Underwood Ammo’s Xtreme Penetrator ammunition in .500 S&W Magnum (brand part no. 347) loads a 420-grain solid copper bullet built for shooters who need maximum straight-line penetration on the largest, most dangerous game a handgun cartridge can address. Rather than a jacketed bullet designed to mushroom, the Xtreme Penetrator is a lathe-turned copper solid, machined to hold its shape and drive a full-diameter wound channel straight through the target instead of expending energy expanding. That construction makes it a favorite for backcountry carry against bear and other dangerous game, where a bullet that keeps driving through bone and muscle matters more than one that opens wide and stops. For .500 S&W Magnum shooters who want maximum penetration from their revolver, this handgun ammunition is built for that job.

Key Specifications

• The chambering is .500 S&W Magnum, one of the most powerful production revolver cartridges made.
• The bullet weighs 420 grains, a heavy-for-caliber weight built for deep penetration.
• The bullet type is copper solid, a non-expanding, lathe-turned monolithic design.
• The solid construction is built to hold its shape and drive straight through heavy bone and muscle rather than expand.
• Shipping weight per box runs 1.92 pounds, useful for shooters planning a case-quantity order.
• Cost runs about $4.48 per round, in line with premium solid-copper penetrator ammunition.
• Each box holds 20 rounds, a practical count for practice and backcountry carry.
• Ten boxes ship per case, letting shooters buy by the case for the best per-round value.
• The fluted nose profile is machined to drive a wide permanent channel without shedding material.

Frequently Asked Questions

Does the Xtreme Penetrator bullet expand on impact? No, it is a solid copper design built to hold its shape and drive straight through heavy bone and muscle rather than mushroom like a jacketed bullet.

What is this load built for? Its penetration-first design is built for backcountry carry against bear and other dangerous game, where driving all the way through matters more than a wide, expanding wound channel.

Buy Underwood .500 S&W Magnum 420gr Xtreme Penetrator

Backcountry defense against the largest, most dangerous animals calls for a bullet that simply keeps going, and Xtreme Penetrator is built for exactly that. Order from our Lubbock, Texas gun shop and it ships fast to your door.