Underwood Ammo
(0)
9mm - +P+ 90 Grain Xtreme Defender - Underwood - 20 Rounds
Brand:
Underwood Ammo
Bullet Type:
Hollow Point
Caliber:
9×19mm Parabellum
Rounds:
20
From:
$21.95
14
(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:
$18.11
14
(0)
Underwood Ammo 50 Beowulf 350 Grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, 557
Brand:
Underwood Ammo
Bullet Type:
Full Metal Jacket (FMJ)
Caliber:
.50 BMG
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
From:
$31.27
14
(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:
$21.38
14
(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
From:
$63.34
12
(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
From:
$39.49
14
(0)
Underwood Ammo .380 ACP 68 Grain Xtreme Defender Solid Monolithic Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 638
Brand:
Underwood Ammo
Bullet Type:
Solid
Caliber:
.355
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
From:
$23.45
13
(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:
$23.45
13
(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
From:
$47.70
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:
$22.99
13
(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
From:
$21.38
13
(3)
Underwood Ammo 10mm Auto 155 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 232
Brand:
Underwood Ammo
Bullet Type:
Jacketed Hollow Point (JHP)
Caliber:
.40 S&W
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
From:
$20.98
13
(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:
$35.38
12
(0)
Underwood Ammo .45 Colt +P 250 Grain Jacketed Hollow Point Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 434
Brand:
Underwood Ammo
Bullet Type:
Jacketed Hollow Point (XTP)
Caliber:
.452
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
From:
$27.15
12
(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
From:
$42.76
11
(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
From:
$50.18
12
(0)
Underwood Ammo .38 Special 150 Grain Coated Hard Cast Nickel Plated Brass Cased Pistol Ammo, 20 Rounds, 732
Brand:
Underwood Ammo
Bullet Type:
Lead Wadcutter (LWC)
Caliber:
.38 S&W Special
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
From:
$17.29
12
(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
From:
$20.58
12
(0)
Underwood 357 Mag 125gr Jhp - 20rd 10bx/cs
Brand:
Underwood Ammo
Bullet Type:
Jacketed Hollow Point (JHP)
Caliber:
.357 Mag
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Grains:
125 grain
From:
$20.58
12
(1)
Underwood 10mm Auto 220gr 20rd 10bx/cs Hard Cast Lead Fn
Brand:
Underwood Ammo
Bullet Type:
Hard Cast Flat Nose (HCFN)
Caliber:
10mm Auto
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Grains:
220 grain
From:
$23.05
13
(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
From:
$23.45
12
(1)
9mm - +P 147 Grain JHP - Underwood - 20 Rounds
Brand:
Underwood Ammo
Bullet Type:
Hollow Point
Caliber:
9×19mm Parabellum
Rounds:
20
From:
$18.92
12
(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:
$20.58
12
(0)
300 AAC Blackout - 220 Grain HPBT - Underwood Subsonic - 20 Rounds
Brand:
Underwood Ammo
Bullet Type:
Hollow Point Boat Tail (HPBT)
Caliber:
.300 AAC Blackout
Capacity:
20
Finish Per Color:
Nickel Plated Brass
Rounds:
20
From:
$34.00
12
Marketplace Insights
★ 4.7/5
based on 36 customer reviews across 267 products from 17 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.
