Hornady Critical Duty 9mm Luger +P 135 Grain FlexLock Ammo - Box of 25
- Capacity-Rounds:
- 25
- Style:
- FlexLock
- Caliber-Gauge:
- 9mm Luger
- Grain:
- 135
- Muzzle Velocity:
- 1110
- Application:
- Home Defense
- Muzzle Energy:
- 369 ft lbs
- Rating:
- +P
- HazAir:
- Yes
Hornady Critical Duty 9mm Luger +P ammunition delivers a modern duty round engineered for reliable performance through barriers and intermediate materials. Built on decades of law enforcement ammunition development, this 135-grain FlexLock load pairs a specialized bullet design with the velocity and power needed for professional and civilian defensive use. The +P loading pushes 984 feet per second at the muzzle, generating 289 foot-pounds of energy—a balanced approach to terminal performance and controllability in 9mm duty guns.
The FlexLock bullet is the standout feature here. Unlike traditional hollow-point designs that can clog when passing through heavy clothing, car glass, or drywall, the Flex Tip geometry resists obstruction and helps initiate consistent expansion. A substantial InterLock band—the mechanical jacket-to-core connection Hornady developed—keeps the bullet structure intact through whatever barriers you might encounter, maximizing weight retention and energy transfer at the point of impact. This matters whether you're training for duty, carrying for personal defense, or qualifying at the range.
Each box contains 25 rounds, the standard packaging for serious shooters building ammunition stockpiles or rotating duty loads. Critical Duty is built to Hornady's published specifications, so you know what to expect from shot to shot. If you're running a modern duty pistol and want ammunition that prioritizes reliable expansion and barrier performance, this is a proven, straightforward choice.
Key Features
- FlexLock bullet design resists clogging through heavy clothing and intermediate barriers
- Mechanical InterLock band retains bullet weight and core integrity for consistent expansion
- +P loading for enhanced velocity and energy in 9mm duty guns
- 25 rounds per box for convenient stocking and qualification
Specifications
| Caliber | 9mm Luger +P |
| Bullet Weight | 135 Grains |
| Bullet Type | FlexLock |
| Muzzle Velocity | 984 feet per second |
| Muzzle Energy | 289 foot-pounds |
| Rounds Per Box | 25 |
Frequently Asked Questions
What is a FlexLock bullet and how does it perform through barriers?
The FlexLock design features a flexible tip that resists clogging when passing through heavy clothing, glass, or drywall—issues that can impede expansion in traditional hollow-point designs. The bullet is also built with an InterLock band that mechanically bonds the jacket to the core, keeping the bullet together and maintaining weight through barrier penetration for reliable terminal performance.
Is Critical Duty 9mm suitable for duty carry and training?
Yes. Hornady Critical Duty is engineered and used by law enforcement and tactical professionals. The +P loading and barrier-performance focus make it appropriate for duty carry, qualification, and serious defensive training in modern 9mm pistols rated for +P ammunition.
What does the +P designation mean?
+P indicates higher pressure loading than standard 9mm Luger. It delivers increased velocity and energy but requires a pistol and magazines rated for +P use. Check your firearm's documentation to confirm +P compatibility before use.
How much ammunition is in a box?
Each box contains 25 rounds.
Ammunition Restrictions:
You must be 18 years or older to purchase shotgun or rifle ammunition, and 21 years or older for handgun ammunition. All ammunition must be shipped via Domestic Ground, and shipping is not available for international residents. Residents of CA, DC, IL, MA, NY, CT, and NJ may be subject to additional restrictions. Always ensure you use the appropriate ammunition for your firearms, and check your state and local laws for any other relevant regulations on firearms and ammunition. Due to Department of Transportation regulations, returns on ammo cannot be accepted. Please verify local laws before placing an order.
We are unable to ship ammunition to the following:
- Hawaii
- Alaska
- P.O. Boxes
- APO/FPO Addresses
- International Addresses
- U.S. Territories
- U.S. addresses with zip codes starting with (100, 101, 102)
Illinois residents must provide a copy of a valid FOID Card or Valid Concealed Carry License, along with their IL driver’s license or IL state identification card to purchase ammunition. The ammunition can only be shipped to an address listed on either of those two documents.
Email: [email protected]

