Underwood Ammo 242 10Mm 220Gr Hard Cast Flat Nose 20 Per Box/10 Case

Underwood Ammo 10mm hard cast ammunition delivers serious stopping power for hunting, defense, and range training. These 220-grain flat-nose rounds combine a non-expanding hard cast projectile with Underwood's Hi-Tek polymer coating, giving you the cleanliness of jacket ammunition with the reliability and penetration of traditional lead hardcast loads. Built for shooters who need dependable, no-nonsense performance in their 10mm pistols or carbines.

Hard cast bullets excel at punching through heavy bone and dense material without deformation, making them the choice for hunters pursuing large game like wild hog and black bear where deep, straight-line penetration matters. The flat-nose design maintains its trajectory and keeps the projectile nose-forward through the target. Underwood's Hi-Tek coating significantly reduces barrel fouling compared to uncoated hard cast, meaning less time cleaning and more time shooting—especially important if you're burning through multiple boxes at the range or in the field.

Each box contains 20 rounds loaded to a muzzle velocity of 1200 fps, and the case option gives you the economy of bulk purchasing without storing 10 individual boxes. Whether you're sighting in for a hunting trip, running drills at the range, or keeping reliable ammo on hand, this is honest ammunition built for serious 10mm users who understand the difference between cheap and dependable.

Key Features

• 220-grain hard cast bullet—maximum penetration without expansion
• Flat-nose design maintains nose-forward orientation through dense material
• Hi-Tek polymer coating reduces barrel fouling and cleanup time
• Non-expanding construction ideal for hunting and defense scenarios
• 1200 fps muzzle velocity
• 20 rounds per box, 10 boxes per case for bulk convenience

Specifications

Frequently Asked Questions

Is this ammunition good for hunting large game?

Yes. The 220-grain hard cast flat-nose design is built to penetrate heavy bone and dense muscle without deforming, making it effective for wild hog and black bear hunting where deep, reliable penetration is essential.

Will hard cast ammunition damage my barrel?

Hard cast rounds are gentler on barrels than jacketed ammunition, but Underwood's Hi-Tek coating adds an extra layer of protection by reducing fouling and buildup, so you'll spend less time cleaning between shooting sessions.

What's included in a case order?

One case contains 10 boxes of 20 rounds each, for a total of 200 rounds. This bulk format offers economy and convenience without requiring separate box storage.

What firearms can I use this ammo in?

This is 10mm Auto ammunition, designed for any standard 10mm pistol or carbine. Always consult your firearm's manual to confirm it is rated for 10mm and check that your specific model is compatible before firing.