Underwood loads their 200gr Hard Cast 10mm to full power at 1,250 fps, producing 694 ft-lbs of muzzle energy. This is a woods carry and animal defense load, not a self-defense round for urban environments. The hard cast lead flat-nose bullet will not expand. Instead, it punches straight through hide, muscle, and bone with minimal deformation. That deep, straight-line penetration is what you need to reach the vitals of a black bear or wild boar through heavy tissue and bone structure.

Hikers, hunters, and backcountry campers in bear country adopted the 10mm specifically for loads like this one. A Glock 20 loaded with Underwood 200gr Hard Cast gives you a realistic defense option against black bears and smaller brown bears at close range. The 694 ft-lbs of energy significantly exceeds what most .44 Magnum loads produce from a snub-nosed revolver, and the semi-automatic platform allows faster follow-up shots. Nickel-plated brass cases resist corrosion from sweat, rain, and humidity during extended time outdoors.

Underwood builds their reputation on loading to the top end of SAAMI pressure specifications. Their 10mm loads are not watered down. The 200gr Hard Cast at 1,250 fps from a 5-inch barrel is a genuine full-power load. Shooters should confirm their pistol handles this pressure level reliably before committing to it as a carry load. Function testing with at least 50 rounds is a reasonable baseline. The hard cast bullet also runs cleaner than unjacketed soft lead, leaving less fouling in the barrel.