Hornady Critical Duty .357 SIG 135gr FlexLock Handgun Ammunition

Dependable Terminal Performance for Duty & Defense

Hornady Critical Duty .357 SIG 135gr FlexLock Handgun Ammunition is engineered to meet the needs of law enforcement professionals and defense-minded shooters seeking superior terminal performance and barrier penetration. Featuring the proven FlexLock® bullet design, this ammunition delivers controlled expansion, deep penetration, and high weight retention, making it ideal for real-world defense scenarios.

Product Description

Designed for consistent performance through various barriers, the Hornady Critical Duty .357 SIG 135gr FlexLock rounds are loaded with high-performance propellants and nickel-plated cases to ensure reliable feeding and corrosion resistance. The Flex Tip® technology and InterLock® band work together to prevent clogging and maintain bullet integrity, providing unmatched stopping power in high-stress situations.

Key Features

• FlexLock® Bullet Technology: Proprietary Flex Tip® initiates controlled expansion while the InterLock® band secures the jacket and core for superior weight retention.

• Barrier-Blind Performance: Engineered to penetrate heavy clothing, glass, drywall, and automotive barriers without compromising expansion.

• Nickel-Plated Brass Cases: Enhances chambering, extraction, and corrosion resistance—ideal for use in duty firearms.

• Low Flash Propellant: Reduces muzzle flash in low-light conditions, preserving shooter visibility and effectiveness.

• Duty-Grade Reliability: Meets or exceeds FBI protocol standards for law enforcement use.

Specifications

• Caliber: .357 SIG

• Bullet Weight: 135 grains

• Bullet Type: FlexLock® Jacketed Hollow Point

• Muzzle Velocity: 1,225 fps

• Muzzle Energy: 450 ft-lbs

• Case Type: Nickel-plated brass

• Primer: Boxer, reloadable

• Packaging: 20 rounds per box

• Usage: Personal defense, law enforcement, tactical applications

Benefits

• Trusted by law enforcement agencies for its consistent performance

• Combines deep penetration with dynamic expansion for optimal terminal ballistics

• Functions flawlessly in semi-automatic pistols and duty handguns

• Minimal recoil and flash, enabling faster follow-up shots

• Designed to perform under stress and adverse conditions

Usage Instructions

• For use in firearms chambered for .357 SIG

• Store in a cool, dry place

• Follow all local, state, and federal laws regarding ammunition purchase and use

Warranty

Hornady stands behind its products with a satisfaction guarantee and excellent customer support. Defective products may be eligible for return or replacement under Hornady’s limited warranty.

Equip yourself with ammunition you can count on when it matters most—Hornady Critical Duty .357 SIG FlexLock delivers uncompromising performance in every round.

Ammunition Shipping Disclaimer:

Federal law mandates that you must be at least 18 years old to purchase rifles, shotguns, and their respective ammunition, and at least 21 years old to purchase all other firearms and ammunition. Ammunition will be shipped via ground service by the carrier of our choice to the contiguous 48 states only.  A street address is required for delivery. There is no option for shipping ammunition to international customers. 

For safety reasons, we do not accept returns on ammunition with no exception. Always make sure you are using the correct ammunition for your firearm.

DNW Outdoors customers in LA, DC, MN, PA, NY, NJ, MA, IL, CT, and CA should check with their local laws for ammunition restrictions before placing an order.

Due to New York State Law requiring a NICS background check at the time of ammunition purchase DNW Outdoors will not be able to sell and ship ammunition to the State of New York. 

Residents of Illinois purchasing ammunition must provide proof of a FOID card via email  at onlinesales1@dnwoutdoors.com with the subject line FOID before ammunition purchased will be shipped.

Residents of New Jersey purchasing ammunition must provide proof of  a FPIC card or New Jersey Handgun permit via email to onlinesales1@dnwoutdoors.com with the subject line of “FPIC” before  the ammunition purchased will be shipped.

Residents of Connecticut purchasing ammunition must provide proof of a Ammunition Eligibility Certificate or Permit to via email to onlinesales1@dnwoutdoors.com with the subject line of “Ammunition Eligibility Certificate”

DNW Outdoors reserves the right to ask for proof of age when buying age restricted items such as ammunition and firearms. No Exceptions.

**WARNING:** This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov