Product SKU # :TSLE91375 |  MPN: 91375  | UPC # :090255913750

Hornady Ammunition 

Hornady Critical Duty 40 S&W Ammo 175 Grain FlexLock - 91375

Rating(s) starstarstarstarstar55 (2)2   View all Ratings
Write A Review
Hornady Critical Duty 40 S&W Ammo 175 Grain FlexLock - 91375
USDTargetSportsUSA32.99
Pricing Options
USDTargetSportsUSA329.90
Pricing Options
out of stock
login to signup for Back in Stock alerts.
out of stock
login to signup for Back in Stock alerts.

Customers Also Bought

  • Details
  • Shipping
You must be 21 years or older to order ammunition. Ammunition must ship UPS ground. Due to safety considerations and legal/regulatory reasons, Ammunition may not be returned. Please check local laws before ordering. By ordering this Ammunition, you certify you are of legal age and satisfy all federal, state and local legal/regulatory requirements to purchase this Ammunition.

Hornady Critical Duty 40 S&W Ammunition 175 Grain FlexLock - 91375

Hornady Critical Duty 40 S&W ammunition is specifically engineered for law enforcement and tactical professionals who require dependable performance through all FBI protocol barriers. At the core of its design is the FlexLock bullet, built with a robust mechanical InterLock band that keeps the jacket and core from separating on impact. This ensures exceptional weight retention and consistent expansion, even when fired through heavy clothing or intermediate barriers. Combined with low-flash propellant and nickel-plated cases for smooth feeding and improved visibility, Critical Duty offers the reliability needed in high-pressure defensive situations.

Features and Specifications:

  • Barrier Tested Performance : Engineered to meet FBI protocol standards across common urban barriers
  • Reliable Expansion: Delivers consistent, controlled expansion and deep penetration
  • Locked Core Design: InterLock band keeps the jacket and core from separating
  • Nickel Plated Case : Supports smooth feeding and resists corrosion in duty environments
  • Packaging Options: Available in boxes of 50 rounds or bulk cases of 500 rounds (10 boxes); free shipping on bulk quantities through Target Sports USA

Deep Dive

Overview

Hornady Critical Duty 40 S&W is purpose-built for professionals and law enforcement personnel who demand consistent performance under pressure. Designed to function reliably in high-stress environments, this ammunition offers dependable expansion, strong weight retention, and predictable results across a wide range of real-world conditions. Whether on patrol or during critical response situations, it provides the confidence needed when performance matters most.

History and Development

Hornady developed the Critical Duty line in direct response to the evolving needs of law enforcement agencies and tactical professionals. Extensive testing and collaboration led to the creation of the FlexLock bullet-a design focused on weight retention, controlled expansion, and consistent results through a variety of challenges. Drawing on decades of ballistic research, Hornady engineered this ammunition to meet stringent performance standards, resulting in a dependable solution for duty carry and professional use.

Common Questions and FAQs

  • How is this ammunition packaged, and are bulk options available?
    This ammunition is sold in 50-round boxes, a bulk option of 500 rounds (10 Boxes of 50) is available. All bulk purchases include free shipping
  • Does this ammunition feature low flash propellant?
    Yes, Critical DUTY ammunition uses low flash propellant to preserve night vision during low-light engagements.
  • Can this ammo be used in all .40 caliber pistols?
    While it is designed for compatibility with most .40 S&W platforms, always consult your firearm's manual or a professional to ensure compatibility.
  • What makes the FlexLock bullet unique?
    The FlexLock bullet includes a Flex Tip and an InterLock band for superior expansion, retention, and "barrier blind" performance.
  • Does the nickel-plated case offer any specific advantages?
    The nickel plating on the case prevents tarnish and enhances visibility for easy chamber checks.
  • Is this ammo recommended for civilian use?
    While primarily crafted for law enforcement, responsible civilian use is possible, particularly for those seeking advanced performance and reliability.

The 'Round Up'

Perfect Fit for:

  • Law Enforcement / Tactical

Why It Stands Out:

Hornady's Critical DUTY 40 S&W 175 Grain FlexLock ammunition stands out as a premium choice for law enforcement and tactical use. Its innovative design allows it to penetrate urban barriers effectively, ensuring reliable performance in critical scenarios. Featuring advanced technology and reliable construction, this ammunition is an excellent tool for professionals facing high-stakes environments. With its superior retention and expansion properties, it delivers on Hornady's promise of quality and performance.

Field Details
MPN91375
UPC090255913750
ManufacturerHornady
PlatformHandguns
Ammo ApplicationLaw Enforcement / Tactical
Ammo TypeFlex Lock
Caliber40 S&W
Grain Weight175 Grain
Quantity Per PackageBox of 50 / Case of 500
Test Barrel Length4 Inches
Muzzle Velocity1010 fps
Muzzle Energy369 ft.lbs
Ballistic Coefficient (G1).155
Case TypeNickel-Plated Brass
Primer TypeBoxer
CorrosiveNo
ReloadableYes
Lead FreeNo
Staked PrimerNot Provided
Country of OriginUSA

BULK AMMO - FREE SHIPPING

We offer Free Shipping on bulk ammo purchases for sale online at cheap discount prices. A case of ammo is a bulk ammo purchase.

Look for "FREE Shipping" next to the bulk ammunition price, add the eligible ammo to your cart, and it will be automatically applied to all orders with eligible bulk ammo products. No coupon code needed 24 hours a day, 7 days a week at Target Sports USA.

UNLIMITED FREE Shipping available on all orders with Target Sports AMMO+ Membership!



SHIPPING AMMUNITION


Attention Ammunition Buyers You must be 21 years or older to order ammunition. Ammo must ship UPS/FedEx Ground. For safety reasons, we cannot accept returns on ammo. Always, make sure that you use the correct ammunition for your gun. Please check local laws before ordering.


Shipping Estimate Please add the product into your shopping cart to get a shipping estimate
   
Ammo Shipping Zones
Target Sports USA only ships ammo to Contiguous 48 states only. We do not ship ammo to Alaska & Hawaii 
   
Proposition 65 Warning
 This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.p65warnings.ca.gov.

Reviews

2 Customer Review(s)
5 Star
2  (100%)
4 Star
0  (0%)
3 Star
0  (0%)
2 Star
0  (0%)
1 Star
0  (0%)
Please login first to write a review.
Comments and Reviews on Hornady Critical Duty 40 S&W Ammo 175 Grain FlexLock - 91375
Performancestarstarstarstarstar
Valuestarstarstarstarstar
Qualitystarstarstarstarstar
Great 40 S&W rounds, no issues with this ammo from Hornady Critical Duty! Fast delivery from TSUSA!
Reviewed by Edward  R
10/28/2025 10:49:05 AM
Comments and Reviews on Hornady Critical Duty 40 S&W Ammo 175 Grain FlexLock - 91375
Performancestarstarstarstarstar
Valuestarstarstarstarstar
Qualitystarstarstarstarstar
Great product, great price, fast delivery
Reviewed by William  N
10/20/2025 9:16:51 PM

AMMO+ MEMBERS GET THE BEST PERKS

We don’t believe in hidden fees or padded shipping costs. While others sneak in charges, we keep it simple. Join AMMO+ and get 8% off every ammo order, free shipping, exclusive member perks, and a welcome gift just for signing up. Straight-up savings. No games.

8% Off Icon

8% OFF AMMO

Anytime. Anywhere. Every Order.

Free Shipping Icon

FREE SHIPPING

on every order. Box, case, or pallet.

Exclusives Icon

EXCLUSIVES

from giveaways to annual events.


Jeep Gladiator

HUGE PERKS LIKE YEARLY TRUCK GIVEAWAYS!

AMMO+ members are automatically entered to win. No extra steps. Just sign up, save money on ammo, and you’re in the running for the ultimate adventure vehicle.

JOIN AMMO+ NOW

AMMO+ WELCOME GIFT BONUS

As a thank you for joining AMMO+, we’re throwing in an ammo can as a bonus with your first member purchase.

VIEW ALL AMMO+ PERKS!
Welcome Gift

OUR PAST TRUCK WINNERS

2024 Winner

2024: DAVID K. - SC

2023 Winner

2023: ADAM B. - TN

2022 Winner

2022: MARK S. - MA

2021 Winner

2021: TROY A. - MI

STRAIGHT FROM THE SOURCE:

REAL MEMBERS. REAL FEEDBACK. REAL DEALS.
Joe Guinta, NJ

Joe Guinta, NJ

Total Savings: $1,779 so far!

"I am a frequent shopper the company is aware of my ammo needs and keeps me on a list for desired ammo should that inventory go on sale."

Brad Dunlap, IN

Brad Dunlap, IN

Total Savings: $4,860 so far!

"The cost of the program is something that pays for itself in no time. Check it out, you’ll be glad you did!"

Jay Patel, FL

Jay Patel, FL

Total Savings: $11,912 so far!

"The benefits provided by the membership are worth every penny, and I could not recommend it enough"

PROUDLY BASED IN THE USA

EXPLORE THE ENTIRE ARSENAL

Our product selections cover everything for the Precision Sports Industry. Don’t let someone else snag what you need. Discover our full range of products before they’re gone.

SHOP BULK AMMO


Questions & Answers

Frequently Asked Questions

Similar Products

View more from Hornady Ammunition

View more in HANDGUN AMMO

Manufacturer Details

About Hornady Ammunition

Hornady Ammunition is proudly made in the USA and built for shooters who demand accuracy and consistency. Offering a full range of handgun, rifle, and hunting loads, Hornady is known for popular lines like Critical Defense®, American Whitetail®, Frontier®, and Precision Hunter®. With advanced engineering and strict quality control, Hornady bullets deliver reliable expansion, optimal velocity, and tight groupings. Target Sports USA offers Hornady ammo for sale in bulk across top calibers like 9mm Luger ammo, .223 Rem ammo, 6.5 Creedmoor ammo, and .308 Win ammo, with free shipping.

Shop Hornady Ammo By Category

Back To Top
HomeAMMOHANDGUN AMMO40 S&W AMMO → Hornady Critical Duty 40 S&W Ammo 175 Grain FlexLock - 91375