Hornady Sub-X .357 Cal 250gr Subsonic Bullets - 100 Count (3503)
$44.33
$45.99
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- Grain:
- 250
- Style:
- Subsonic-eXpanding
- Bullet Tip Material:
- Polymer
- Cannelure:
- Yes
- Coefficient:
- 0.265
- Core Material:
- Lead
- HazAir:
- Yes
- Jacket Material:
- Brass
- Quantity:
- 100 Per Box
- Sectional Density:
- 0.28
- Weight:
- 250 gr
Hornady Sub-X .357 Cal 250gr subsonic bullets are purpose-built for reloaders who need reliable expansion at the low velocities that define suppressed shooting. These 100-count rifle bullets feature a lead core and gilding metal jacket engineered to perform below the speed of sound—a critical advantage when you're running a can and want terminal performance to match your ballistic signature. Whether you're handloading for a semiautomatic .357 platform or a bolt gun, Sub-X delivers the kind of deep penetration and controlled expansion that serious subsonic hunters and shooters depend on.
The design centers on Hornady's patented Flex Tip insert, a spring-loaded cavity that initiates reliable expansion even at velocities as low as 900 fps. That's where most standard hollowpoints fail—they simply won't open at subsonic speeds. Long grooves machined into the jacket work in concert with the Flex Tip to ensure consistent, predictable mushrooming on game or steel. Cannelures on the jacket give you a positive crimp ring, making reloading secure and trouble-free in semi-automatic firearms where reliable feeding is non-negotiable.
These bullets have been validated against FBI terminal ballistic protocols, so you're not betting on hype—you're loading ammunition that meets established performance standards. The 250-grain weight in .357 caliber is a serious projectile, capable of punching through to vitals on medium game when velocity is kept subsonic. That combination of mass and low-velocity expansion is exactly what separates subsonic hunting from just shooting quietly.
A 100-count box gives you a practical quantity for developing loads or building a modest subsonic hunting supply. Reloaders who prioritize hearing-safe performance and terminal reliability will find these bullets eliminate the usual tradeoff between suppression and stopping power.
Key Features
- Patented Flex Tip technology for reliable expansion below 900 fps
- Lead core with grooved gilding metal jacket for controlled expansion
- Cannelured design ensures positive case crimp for semiautomatic feeding
- Validated against FBI terminal ballistic test standards
- 250-grain weight for deep penetration at subsonic velocities
- 100 bullets per box
Specifications
| Caliber | .357 |
| Bullet Weight | 250 grains |
| Count per Box | 100 |
| Core Material | Lead |
| Jacket Material | Gilding metal |
| Design Type | Sub-X (Subsonic–eXpanding) |
| Cannelure | Yes |
| Minimum Expansion Velocity | 900 fps |
Frequently Asked Questions
Will Sub-X bullets work in my .357 semiautomatic rifle?
Yes. The cannelured jacket and lead core are specifically designed for positive case crimp in semiautomatic platforms, ensuring reliable feeding and function in gas system rifles and other semi-auto .357 guns.
What makes Sub-X bullets reliable at subsonic velocities?
The patented Flex Tip insert and long grooves in the jacket work together to initiate and control expansion even at velocities as low as 900 fps—speeds where conventional hollowpoints often fail to open.
Can I use these for hunting with a suppressor?
Yes. Sub-X bullets are engineered specifically for subsonic shooting. The combination of 250-grain weight, reliable low-velocity expansion, and proven terminal performance makes them well-suited for suppressed hunting applications.
Have these bullets been tested for performance?
Yes. Sub-X bullets meet FBI protocol for terminal ballistic test requirements, so they're validated beyond marketing claims.
