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.
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: Brass
- Muzzle Velocity: 1300 fps
- Muzzle Energy: 582 ft. lbs.
Showing reviews 1-10 of 13 | Next
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
I love this ammo!
Posted by Jason Camis (Camp Hill, PA) on 27th Dec 2014
This ammunition only has one thing wrong with it, theres not enough of it! I wish I had bought more. Underwood is the ammo company many people have been waiting for, not only loading hot 10mm and 357sig ammo to correct for the indusrtries attempt to reinvent excellent rounds with watered down junk for ppl who shouldn't be shooting such rounds in the 1st place. Underwood took it a step further by offering hotter than standard industry loads in EVERY CARTRIDGE! I hope these guys stick around a long time.
Review Submitted on: Wed, 01/23/2013
Hot, Fast, and High Quality
Posted by Andrew Miller (Crystal City, MO) on 27th Dec 2014
I had converted my Glock 23 to .357 sig to get a high energy & velocity round. However, after finding this ammo in .40 here I can no longer justify using the .357 sig instead of this. This is as fast, as energetic, and in a heavier and bigger round. This stuff is GREAT. This is the way .40 s&w was meant to be. AND it's a great price!
Review Submitted on: Wed, 12/18/2013
Showing reviews 1-10 of 13 | Next