Underwood .454 Casull 300gr XTP Ammunition, 20-Round Box

The Underwood .454 Casull 300gr XTP (part no. 342) pairs .454 Casull with a 300-grain XTP built for concealed carry, home defense, or duty use. Underwood builds this load around consistent, factory-tested components. The hollow-point cavity is built to expand on impact, increasing the wound channel while the jacket keeps the core from fragmenting apart, controlling penetration depth. It is one of the handgun ammunition options stocked here, chosen for real-world performance rather than shelf filler. It is a load built to run in the pistols people actually carry and shoot.

Key Specifications

• The caliber is .454 Casull, a proven chambering with wide pistol and ammunition compatibility.
• The bullet weighs 300 grains, balancing velocity and downrange energy for this cartridge.
• The bullet is a 300-grain XTP, a jacketed hollow point design.
• The hollow-point cavity is built to expand on impact, increasing the wound channel while the jacket keeps the core from fragmenting apart, controlling penetration depth.
• Each box holds 20 rounds, enough to sight in and still have rounds left for the field or the range.
• This SKU ships in a 10-box case (200 rounds total), ideal for high-volume shooters, clubs, or instructors stocking up.
• At about $1.93 per round, priced for regular range trips without rationing shots.
• The box ships at 1.37 lbs, a useful reference for flat-rate shipping and bulk order planning.

Frequently Asked Questions

Is this a good round for concealed carry or home defense? Yes, the XTP bullet is built to expand reliably on impact for personal-defense use.

What is this .454 Casull load built for? With a 300-grain XTP, it is built for concealed carry, home defense, or duty use.

How many rounds come in a box? Each box holds 20 rounds.

Buy the Underwood .454 Casull 300gr XTP

Whether it rides in a carry gun or feeds a training session, keep the supply stocked. Order from our Lubbock, Texas gun shop and it ships fast to your door.