Underwood Ammo’s bonded rounds are unrivaled in power and precision. We utilize Speer bonded bullets which employ an exclusive Uni-Cor process where they bond the jacket to the core one molecule at a time. This essentially eliminates core-jacket separation, maximizes weight retention, and allows for unparalleled penetration and controlled yet fatal expansion.
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: 357 Sig
- Bullet Weight: 125 Grains
- Bullet Style: Speer Bonded Jacketed Hollow Point
- Case Type: Brass
- Muzzle Velocity: 1475 fps
- Muzzle Energy: 604 ft. lbs.
Customer Submitted Videos
Showing reviews 1-10 of 18 | Next
THIS IS THE REAL .357 SIG AMMO!!!
Posted by Tom Mcintire on 8th Feb 2015
Compare Underwood ammo to any other commercial .357 sig and be AMAZED! Underwood has brought .357 Sig back to life! Wichester, Federal and even Corbon have nothing on Underwood .357 Sig.!!! If you want the truth, the chronograph will certainly tell you the truth about Underwood ammo!
Best of All Worlds
Posted by Patrick Ringrose on 8th Feb 2015
Accuracy, manageability of recoil (time back on follow-up shots) and power/energy. For my money (and my life) this is the single best round ever. You can drive tacks with it and you're back on track for the 2nd shot quickly, although it is HIGHLY unlikely that an assailant will get up after a well-placed shot due to the 630+ ft/lbs energy.
When I carry, I only carry pistols loaded with Underwood. I alternate between my Kimber .45,Pro Carry II, Ruger LC9 Pro 9mm and my Glock in .357 SIG depending upon weather & where I'll be, but Underwood is a constant.
Posted by Thomas R. on 8th Feb 2015
Bought these for use in my Glock 22 fitted with a Lone Wolf 357 Sig barrel. No problems at all, Clean burning and accurate and fun to shoot as well. Underwood will continue to be my #1 ammo for everything from hunting to self defense.
Best 357 Ammo Anywhere
Posted by Jerry on 8th Feb 2015
This ammo is phenomenal! It has actual 357 power, combined with accuracy and reliability. Underwood delivers the best as always. This is my carry round and I trust my safety to Underwood.
>357 Mag Ballistics From An Auto
Posted by Randall Donner on 7th Feb 2015
I purchase this .357Sig ammo as an alternative to my .40 S&W in my Glock 22. I bought an aftermarket barrel in .357Sig, so now I can have .357 mag ballistic from my Glock 22 when necessary. I love any and all Underwood ammo, especially bonded bullets. Highly recommended
Posted by SPN (Moline, IL) on 27th Dec 2014
I tested the 125 grain BJHP ammo head to head against two other major (and more expensive) brands at my local shooting range. I loaded my Sig P226 Elite magazines with alternating rounds of this ammo and the two other brands. As I cycled through the rounds, there was a distinct difference in the "pop" and feel of this ammo. Not a real big difference in the recoil, but I definitely got people's attention whenever my magazine reach the Underwood ammo. I also purchased a box of the reloaded BFMJ ammo. It is as good as any new FMJ ammo I have bought from any other manufacturer. It is so clean and performs so well, it's hard to tell it's reloaded ammo! IMO, this appears to be accurate, powerful, and reliable ammo. It is also visibly the cleanest looking ammo I have ever purchased. All the bullets and shells were shiny and blemish-free. I purchased a box of the Underwood .40 Cal 165 grain BJHP also, and had the same excellent results as I did with this .357 ammo. As long as Kevin keeps producing high quality ammo like this, I will continue to buy all my ammo from Underwood.
Review Submitted on: Thu, 11/15/2012
Posted by Steve H. (Michigan) on 27th Dec 2014
This is my second order from UA. All I can say is that it keeps getting better every time I order. This 357 SIG is the "Real Deal" loaded the way it was meant to be!!! Performance Ammo, Good Price and Super Fast Shipping!!! So good I hate to tell my friends about UA. Keep up the good work!!!
Review Submitted on: Wed, 12/19/2012
Fun to shoot!!!
Posted by Stan (Stow, OH) on 27th Dec 2014
These rounds are great fun to shoot. They are loud and pack a good punch. Good quality and very fast shipping. I will be buying more FOR SURE. Thank you Underwood for making reasonably priced, full power 357 Sig ammo. Stan
Review Submitted on: Thu, 10/18/2012
Very good ammunition
Posted by Paul Prochko (Pocatello, ID) on 27th Dec 2014
I have tested the 125 gr. hollow point ammunition and find it to be very accurate and meeting velocity expectations (as advertised) in two different 357 Sig handguns. I intend to continue to purchase this ammunition. I haven't tested for muzzle flash and the powder used may or may not be treated with flash suppressant. In any case, Underwood is reliable to deal with, answers questions directly and ships promptly. I really can't ask for more.
Review Submitted on: Tue, 10/23/2012
Raining Cats & Dogs!
Posted by J Welle (Wisconsin) on 27th Dec 2014
I never thought I would actually see a 357sig attain it's true potential! I avg 1502fps with my Glock 32! Over 625ftlbs!!!! 100% function and accurate at 20yds! LOUD AS HECK!
Review Submitted on: Mon, 10/08/2012
Showing reviews 1-10 of 18 | Next