Underwood Ammo
(1)
Underwood Ammo 10mm Auto 140 Grain Xtreme Penetrator Solid Monolithic Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 648
Brand:
Underwood Ammo
Bullet Type:
Xtreme Penetrator
Caliber:
.40 S&W
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Grains:
140 grain
From:
$37.00
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12
(0)
38 Special - +P 125 Grain JHP XTP - Underwood - 20 Rounds
Brand:
Underwood Ammo
Bullet Type:
Jacketed Hollow Point (JHP)
Caliber:
.38 S&W Special
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
From:
$19.65
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11
(3)
Underwood Ammunition 10mm Auto 200 Grain Hornady XTP Jacketed Hollow Point Box of 20
Brand:
Underwood Ammo
Bullet Type:
Jacketed Hollow Point (JHP)
Caliber:
10mm Auto
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Grains:
200 grain
From:
$23.22
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11
(3)
Underwood Ammo 10mm Auto 135 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 231
Brand:
Underwood Ammo
Bullet Type:
Jacketed Hollow Point (JHP)
Caliber:
.40 S&W
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
From:
$22.32
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10
(0)
45 ACP - +P 230 Grain JHP - Underwood - 20 Rounds
Brand:
Underwood Ammo
Bullet Type:
Jacketed Hollow Point (JHP)
Caliber:
.45 ACP
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
From:
$22.32
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10
(0)
Underwood Xtreme Defender Ammunition 45 ACP +P 120 Grain Lehigh Xtreme Defense Lead-Free Box of 20
Brand:
Underwood Ammo
Bullet Type:
Solid
Caliber:
.45 ACP
Capacity:
20
Grains:
120 grain
Rounds:
20
(0)
Underwood Ammunition 500 S&W Magnum 350 Grain Hornady XTP Jacketed Hollow Point Box of 20
Brand:
Underwood Ammo
Bullet Type:
JHP
Caliber:
.500 S&W MAG
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Grains:
350 grain
(3)
Underwood Ammo 10mm Auto 180 Grain XTP Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 243
Brand:
Underwood Ammo
Bullet Type:
Hollow Point
Caliber:
.40 S&W
Rounds:
20
(0)
Underwood Ammo 10mm Auto 150 Grain Xtreme Hunter Solid Monolithic Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 900
Brand:
Underwood Ammo
Bullet Type:
Solid
Caliber:
.40 S&W
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
(0)
Underwood Ammo .44 Remington Magnum 220 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 841
Brand:
Underwood Ammo
Bullet Type:
Solid Xtreme Penetrator
Caliber:
.44 Caliber
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
(0)
UNDERWOOD 9MM LUGER +P 124GR FMJ 50RD 10BX/CS
Brand:
Underwood Ammo
Bullet Type:
Full Metal Jacket
Caliber:
9×19mm Parabellum
Grains:
124 grain
Rounds:
50
(0)
Underwood 357 Mag 158gr Xtp - 20rd 10bx/cs Jhp
Brand:
Underwood Ammo
Bullet Type:
Jacketed Hollow Point (JHP)
Caliber:
.357 Mag
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Grains:
158 grain
(4)
9mm - 90 Grain Xtreme Defender - Underwood - 20 Rounds
Brand:
Underwood Ammo
Bullet Type:
Xtreme Defense
Caliber:
9×19mm Parabellum
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Grains:
90 grain
(0)
9mm - +P+ 90 Grain Xtreme Defender - Underwood - 20 Rounds
Brand:
Underwood Ammo
Bullet Type:
Hollow Point
Caliber:
9×19mm Parabellum
Rounds:
20
From:
$25.46
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10
(1)
9mm - +P 90 Grain Xtreme Defender - Underwood - 20 Rounds
Brand:
Underwood Ammo
Bullet Type:
Xtreme Defense
Caliber:
9×19mm Parabellum
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Grains:
90 grain
From:
$25.28
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10
(0)
Underwood Ammo .500 S&W Magnum 700 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 741
Brand:
Underwood Ammo
Bullet Type:
LFN (Lead Flat Nose)
Caliber:
.50 BMG
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
(0)
Underwood Ammo .500 S&W Magnum 420 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 347
Brand:
Underwood Ammo
Bullet Type:
Solid Xtreme Penetrator
Caliber:
.50 BMG
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
(0)
Underwood Ammo .458 SOCOM 350 Grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, 461
Brand:
Underwood Ammo
Bullet Type:
Full Metal Jacket (FMJ)
Caliber:
.458 Win Mag
Capacity:
20
Finish Per Color:
Brass
Rounds:
20
(0)
Underwood Ammo .45-70 Government +P 325 Grain Solid Monolithic Nickel Plated Brass Cased Rifle Ammo, 20 Rounds, 908
Brand:
Underwood Ammo
Bullet Type:
SC (Solid Copper)
Caliber:
.458 Win Mag
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Grains:
325 grain
(2)
Underwood Ammo .45 ACP +P 200 Grain Solid Monolithic Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 646
Brand:
Underwood Ammo
Bullet Type:
Solid Copper
Caliber:
.452
Grains:
200 grain
Rounds:
20
(0)
Underwood Ammo .44 Special 245 Grain Full Metal Jacket Nickel Plated Brass Cased Pistol Ammo, 50 Rounds, 323
Brand:
Underwood Ammo
Bullet Type:
Full Metal Jacket (FMJ)
Caliber:
.429 DE
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
50
(0)
Underwood Ammo .44 Mag Ammunition 200 Grain 20 Rounds JHP
Brand:
Underwood Ammo
Bullet Type:
Jacketed Hollow Point (JHP)
Caliber:
.44 Magnum
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
(0)
Underwood Ammo .41 Remington Magnum 265 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 746
Brand:
Underwood Ammo
Bullet Type:
Hard Cast (HC)
Caliber:
.41 LC
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Grains:
265 grain
(0)
Underwood Ammo .41 Remington Magnum 210 Grain XTP Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 431
Brand:
Underwood Ammo
Bullet Type:
Jacketed Hollow Point (XTP)
Caliber:
.41 LC
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
Marketplace Insights
★ 4.7/5
based on 36 customer reviews across 255 variants from 27 retailers
Highly-rated ammunition praised for full power performance and hunting effectiveness, with rare quality control concerns noted by a few users.
What customers like
Full Power & Performance42%
This aint no watered down retail factory ammo. This is true full power 10mm.
Reliable & Consistent31%
Very high quality ammo, consistent and reliable shooting.
Effective for Hunting28%
I've love hunting with my handguns this ammo works great in both of my sig 220 10mm.
Superior Stopping Power25%
This ammo leaves 2 greater permanent wound cavities than the average hollow point.
Excellent for Self Defense22%
The only round I will ever carry in my 9mm pistols.
Common concerns
Quality Control Issues8%
3-4 out of 20 fail ammo checker gauge, the remaining barely pass.
Case Crimping Problems3%
The lip on the cases are not crimped even a little and will cause jams when chambering.
Primer Seating Inconsistency3%
not all primer seating was the same. Caution advised especially for a defense or even offensive round.
Frequently Asked Questions
Underwood Ammo
Is Underwood 10mm ammo good?
Underwood 10mm ammo is well-regarded for reliability and penetration in self-defense and hunting use. It's widely available across major retailers, with prices typically around $36 per box. Most users report consistent performance, making it a solid choice for 10mm shooters.