Description
Underwood's 200 grain hard cast flat nose round is designed from the ground up for medium to large game and serious field work where deep, consistent penetration matters. The wide flat profile cuts a decisive hole without expanding, letting the bullet punch straight through with tremendous force. This makes it the go-to choice when you need something that works on hogs, bears, or anything else tough enough to require a 10mm.
What Sets the Black Cherry Coating Apart
The Black Cherry polymer coating is where this load really differentiates itself from basic hard cast. It keeps lead completely off the bore, virtually eliminating fouling that can slow you down during extended shooting sessions. The coating also reduces friction, which allows Underwood to push these projectiles to 1250 fps while staying safe across all 10mm platforms, including polygonal-rifled Glocks. That thermal stability means the coating handles sustained fire and higher heat without breaking down, protecting both your barrel and maintaining consistent performance.
Built for Reliability and Reloading
You get nickel-plated brass casings that feed smooth, resist corrosion better than standard brass, and stay clean for reloading. The ammunition is non-corrosive, boxer primed, and fully reloadable, so you can get multiple uses out of each case. Flash-suppressed powder means your vision stays sharp in low-light situations when it counts most. Twenty rounds per box package makes this an easy grab for hunters, competitors, or anyone training with a full-power load.
Key Specifications
- Caliber: 10mm Auto
- Bullet Weight: 200 grains
- Bullet Type: Hard Cast Flat Nose
- Bullet Coating: Black Cherry Polymer
- Muzzle Velocity: 1250 fps
- Muzzle Energy: 694 ft-lbs
- Case Material: Nickel-Plated Brass
- Primer: Boxer
- Reloadable: Yes
- Powder Type: Flash-Suppressed
- Rounds Per Box: 20
- Ammunition Type: New Production, Non-Corrosive
- Manufacturer Part Number: 248
- UPC: 816874020897
What’s Included
- 20 rounds of 10mm Auto ammunition
Frequently Asked Questions
Will this ammo work safely in my Glock 20 with polygonal rifling?
Yes. Underwood specifically designed this load to function safely in all 10mm firearms including Glocks with polygonal rifling. The Black Cherry coating prevents lead-to-bore contact, so you won't get the leading issues that can happen with uncoated hard cast in modern barrels. You can run it without worrying about accuracy or barrel damage.
How does the Black Cherry coating prevent lead fouling?
The polymer-based Black Cherry coating sits between the lead bullet and your barrel, so the lead never actually touches the bore. This eliminates the buildup that typically happens with bare hard cast projectiles. The coating also has thermal stability to handle the heat and pressure without breaking down, which keeps your bore clean even during longer shooting sessions.
Is this load overpowered compared to standard 10mm ammo?
At 1250 fps and 694 ft-lbs of energy, this is a full-power, serious hunting load, not plinking ammunition. It generates noticeable recoil, so budget time at the range to get familiar with how it shoots in your specific firearm. If you're new to 10mm or coming from lighter loads, practice with it to ensure reliable function and accuracy.
Can I reload these casings?
Yes. The nickel-plated brass is reloadable and comes boxer primed, so you can process them normally. The nickel plating even makes cleaning easier between reloading sessions compared to standard brass.



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