Hornady Sub-X 7.62x39mm 255gr Expanding Rifle Ammunition

Product Description

The Hornady 7.62x39mm .3115 255 Grain Sub-X bullet is a purpose-built subsonic expanding projectile designed specifically for suppressed and low-velocity applications. Developed under Hornady’s Sub-X (Subsonic eXpanding) line, the bullet is engineered to provide controlled expansion and deep penetration at velocities below the speed of sound where traditional rifle bullets often fail to expand reliably.

The projectile uses a lead core with a gilding metal jacket, deep expansion grooves, and Hornady’s patented Flex Tip insert to help initiate expansion at subsonic velocities. The extremely heavy 255-grain weight is optimized for suppressed 7.62x39 builds and specialty subsonic loads intended for reduced sound signature and improved terminal performance at close to moderate distances.

Key Features

• Caliber: 7.62x39mm / .3115 diameter
• Bullet Weight: 255 grains
• Bullet Type: Sub-X Subsonic Expanding
• Patented Flex Tip insert
• Designed for reliable subsonic expansion
• Gilding metal jacket construction
• Lead core design
• Optimized for suppressed shooting applications
• Deep penetration and controlled expansion characteristics
• 100 bullets per box

Product Highlights

Hornady developed the Sub-X line specifically because many traditional rifle bullets do not reliably expand at subsonic velocities. The Sub-X design addresses this by using engineered jacket grooves and a soft Flex Tip insert to promote expansion even below the speed of sound.

The unusually heavy 255-grain weight makes this one of the heavier commercially available 7.62x39 projectile options, helping maximize retained energy and momentum in suppressed subsonic rifle systems. These bullets are especially popular among suppressor users running bolt-action or custom-tuned semi-auto platforms.

Benefits

• Reliable expansion at subsonic velocities
• Optimized for suppressed shooting systems
• Heavy bullet weight improves momentum and energy retention
• Designed for deep penetration
• Reduced sound signature when loaded subsonic
• Purpose-built for specialty 7.62x39 applications

Ideal Use

Perfect for suppressed 7.62x39 rifles, subsonic handloads, hunting applications requiring reduced sound signature, and specialty precision subsonic shooting setups.

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.

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**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