Underwood Ammo’s XTP rounds are notable for their power and accuracy. We utilize Hornady’s eXtreme Terminal Performance (XTP) bullets which are designed for deep terminal penetration, great accuracy and controlled expansion. We combine Hornady’s unparalleled XTP bullets with our own carefully formulated design which results in one lethal round.
Nickel plated casings with our new nickel plating process provides several key benefits, not limited to but including; improved feeding in all actions of firearms, enhanced corrosion resistance over traditional brass, improved cosmetics, and ease of cleanup during reloading. Nickel plated casings will not tarnish like brass during storage or when in contact with foreign materials such as leather, moisture, and other metals.
Until the development of the Ducta-Bright 7a process, nickel plating casings often limited the number of reloads as compared to raw brass. It was claimed that nickel plated brass casings “embrittled” the brass therefor making it less desirable for reloaders despite the ease of cleanup that nickel plating offers. In addition, ammunition engineers raising concerns of using nickel plating in “very hot” +P or magnum loads found that traditional nickel plating often cracked deep-drawn cases, or worse, lead to a total failure. This new process eliminates any concern, to the shooter or reloader, of hazard or ability to re-use the brass.
As with all of Underwood Ammo’s rounds, we utilize flash suppressed powder so that your vision will not be compromised if it becomes necessary to use your firearm in low light.
While taking advantage of our state of the art testing equipment, this high performance ammunition is field tested using popular, real firearms that our customers are most likely to own out in the real world with all the elements you would experience. If for some reason Underwood Ammunition fails to meet performance expectations, we stand by our product 100% and will make sure the customer is satisfied with every purchase.
This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.
- Caliber: 40 S&W
- Bullet Weight: 155 Grains
- Bullet Style: Hornady XTP Jacketed Hollow Point
- Case Type: Ducta-Bright 7a Nickel Plated Brass
- Muzzle Velocity: 1300 fps
- Muzzle Energy: 582 ft. lbs.
Showing reviews 1-10 of 15 | Next
357 mag prerformance
Posted by flintlocker on 27th May 2016
recoil was not bad. the bullets hit and sounded like a full power 357 mag. used different types of xtp bullets on deer's 44 45 they open at low velocity and hold together at high velocity.
Posted by William on 27th Jan 2016
This is the first time I bought Underwood ammo and I wanted 165g XTPs but it was OOS at the time so I got the 155s.
All I can say is don't commit a crime against me.
This sound like a Magnum and shoot like one. Super fast and hits hard but without an increased recoil over other loads. Underwood know what they're doing.
Posted by John on 4th Jul 2015
Always top quality at affordable pricing. I highly recommend Underwood Ammo.
My carry ammo
Posted by Unknown on 27th Jun 2015
I carry this ammo in my Glock 23 daily. It's very accurate and reliable. Great ammo!!
My go-to for self-defense ammo!
Posted by Unknown on 12th May 2015
The ammo is very powerful. It brings my M&P 40 to a whole new level, the .357 level. I've never shot 10mm so I can't speak to that, but it feels similar to my 4" GP-100. Now I get that power without having to change to a .357 barrel. Oh, and the price for these is fantastic. I will definitely buy more.
One thing I lament is that I haven't seen any proper gel tests on the internet done with these loads. Can somebody please do one?
Nothing even close.....
Posted by Greg Stott on 7th Feb 2015
I said this about the other .40 ammo and this load is even more effective. Really fast; really clean; consistent penetration and accuracy. So much better than the others - this, along with their other loads seem to work best in all my handguns.
Posted by Ryan on 7th Feb 2015
I fired 25 rounds through a Glock 27 over the chronograph. Average fps : 1321 !!!! They functioned flawlessly (as with all Underwood ammo) and were very accurate, I was easily achieving 2" groups @ 25 yds. These 155's hit extremely hard, this is 10mm performance folks! Awesome carry load, I highly recommend!
Great Product! Great Company!
Posted by Ryan (Edgewood, FL) on 27th Dec 2014
Purchased several times from Underwood and each time the process is simple, quick and efficient!! My recent purchase that I just received today was just the same even in this crazy time when people are going nuts ordering. Ordered Friday and received the ammo Tuesday!! Excellent! Great prices!! Great product!! Great company!!
Review Submitted on: Tue, 01/15/2013
40 S&W Carry Ammo
Posted by Ed Garrett (Durant, OK) on 27th Dec 2014
I just got back in from my range after testing your 155 XTP & 165 GDHP 40S&W loads. I used an Oehler 35P chronograph, the temp was 40 degrees F. My weapon is a stock Glock 23, well broken in. Remington's 165 BJHP came in at 1065 fps, Winchester's 155 JHP Ranger load clocked 1139 fps, their Silvertip 155 runs 1164 fps. Speer's 165 GDHP @ 999 fps, and Federal's 180 HST @ 953 fps. When I tested Underwood's offerings, the 155 XTP clocked 1295, the 165 GDHP @ 1180 fps! The loads functioned flawlessly, and grouped to expectation @ 50 ft. The 155's are replacing the Winchester Rangers or Silvertips that I have carried for several years. It is great to have access to quality ammo that meets or exceeds advertised performance.
Review Submitted on: Fri, 01/04/2013
Great ammunition from a great company!
Posted by Eric G. (CRESCO, PA) on 27th Dec 2014
Normally I don't leave "rave" reviews and I don't normally consider "rave" reviews of a product an accurate assessment....that was until I purchased a number of different calibers from Underwood. This company is nothing short of amazing and their ammunition is second to none! A superior product at prices that are well below the competition (for similar quality) makes this my only stop for ammunition. I'm convinced that if Kevin Underwood sold cars, I would buy my next vehicle from him. Underwood does business the way it was meant to be done; thanks Kevin, I appreciate your attention to detail and for delivering what you advertise.
Review Submitted on: Thu, 02/28/2013
Showing reviews 1-10 of 15 | Next