The Hornady Critical Duty 357 SIG 135 Grain FlexLock is a premium law enforcement–grade defensive round engineered to deliver consistent, reliable performance through real-world barriers — making it one of the most trusted duty ammunition choices available today.
- 135-grain FlexLock bullet provides deep, consistent penetration through barriers
- Barrier-blind performance through glass, steel, wallboard, and heavy clothing
- Muzzle velocity of 1,225 fps delivers flat trajectory and reliable terminal ballistics
- Flex Tip technology initiates expansion even after passing through tough barriers
- Full-length bullet jacket prevents core-jacket separation for maximum weight retention
- 20 rounds per box, loaded to SAAMI specs for reliable feeding in duty pistols
Who This Is For
Hornady Critical Duty 357 SIG is purpose-built for law enforcement officers, armed security professionals, and serious concealed carriers who rely on a full-size handgun for personal protection. If you need ammunition that performs predictably after passing through common urban obstacles — car glass, interior walls, or heavy clothing — this round is designed specifically for that mission-critical role.
Specifications
| Brand | Hornady |
|---|---|
| Caliber | 357 SIG |
| Bullet Weight | 135 Grain |
| Bullet Type | FlexLock (Critical Duty) |
| Muzzle Velocity | 1,225 fps |
| Muzzle Energy | 450 ft-lbs (approx.) |
| Rounds Per Box | 20 |
| Casing | Nickel-Plated Brass |
| Primer Type | Boxer, Non-Corrosive |
| Application | Duty / Self-Defense |
| Part Number | 91296 |
Frequently Asked Questions
What makes FlexLock different from standard hollow point bullets?
The Hornady FlexLock bullet combines two key innovations: a Flex Tip insert that initiates reliable expansion even after the hollow point cavity becomes clogged passing through barriers, and an InterLock band that mechanically locks the bullet jacket to the lead core. This prevents the separation that can occur in standard hollow points after barrier penetration, ensuring maximum weight retention and consistent terminal performance in soft tissue.
Is this ammunition compatible with my 357 SIG pistol?
Yes — Hornady Critical Duty 357 SIG is loaded to SAAMI specifications and is compatible with any firearm chambered in 357 SIG, including popular duty pistols from Glock (G31, G32, G33), Sig Sauer (P229, P226), and others. Always verify your specific firearm's manual for ammunition recommendations, particularly if your pistol has a ported barrel or compensator.
How does Critical Duty compare to Critical Defense, and which should I choose?
Hornady Critical Duty is optimized for full-size duty pistols and is engineered to meet the FBI's demanding barrier penetration protocol — making it ideal for law enforcement and duty carry. Critical Defense, by contrast, is tuned for shorter-barreled concealed carry firearms and lighter clothing barriers. If you carry a full-size 357 SIG pistol and need consistent performance through hard barriers, Critical Duty is the right choice.
- Caliber:
- 357 SIG
- Bullet Weight:
- 135 GR
- Bullet Type:
- FlexLock Duty
- Type:
- Rifle Ammunition
- Box Quantity:
- 20
- Case Quantity:
- 200
- Lead Free:
- Yes