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Questions & Answers
Customer Reviews
Helpful Positive Review
Remington1 by Remington, Verified Owner, April 2, 2025
Great product for big predators out in the backcountry!! Go get you some!
1/1 found this helpful
Most Recent Reviews
Underwood 220 gr hard cast 10mm by Eddo, November 11, 2025
I’ve used these for a year or two in my bear defense gun with. I mostly use the 200 gr version now for faster shots, but use these for training. They kick a bit more than the 200 gr. Both are very reliable
Most Recent Reviews
Good except for one. by WW, Verified Owner, May 18, 2025
I shot a box of 20 from a Glock 20 that’s had about 500 total rounds through it. On one of the shells, the case split open lengthwise down the side which caused the slide to not fully cycle. I have pictures but can’t figure out to post them. My frien...
Read More...
Most Recent Reviews
Hog Stopper by Ben M, Verified Owner, May 15, 2025
These rounds out of my FN510 drop Florida hogs on the spot!
Most Recent Reviews
Looks great by Canon, Verified Owner, January 1, 2025
Fast shipping and packaged well. The quality looks great but I have not had a chance to try it out as of yet but when I do I will update my review.
Most Recent Reviews
It does a good job on large critters!!! Also it's cheaper than Buffalo bore,which makes it nice to practice with if you prefer Buffalo bore for use in the outdoors.But I've found it to be just as good an less lead build up over time in a barrel.
Read All 6 Reviews
Number of Rounds:
20

Code: 40U-LAP-A242-242

MPN: 242

UPC: 816874020842

List: $48.79Save 43%
$1.40/Round
$27.99

Product Info for Underwood Ammo 10mm Auto 220 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammunition

Underwood Ammo loads premium ammunition with a focus on reliable accuracy using new brass, high quality projectiles and primers, and clean burning flash suppressed powders.image

WARNING: California`s Proposition 65

Specifications for Underwood Ammo 10mm Auto 220 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammunition:

Manufacturer: Underwood Ammo
Caliber: 10mm Auto
Number of Rounds: 20
Bullet Type: Flat Nose (FN)
Bullet Weight: 220 grain
Cartridge Case Material: Nickel Plated Brass
Muzzle Velocity: 1200 ft/s
Muzzle Energy: 704 ft-lbs
Application: Target
Package Type: Box
Primer Style: Centerfire
Sectional Density: 0.2
Lead Free: No

Package Contents:

  • Underwood Ammo 10mm Auto 220 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo

Underwood Ammo 10mm Auto 220 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammunition Orderable Models

List of Orderable Models

  • Underwood Ammo 10mm Auto 220 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 242 , MPN: 242 , UPC: 816874020842 , Code: 40U-LAP-A242-242
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