.3115 | 255gr | Hornady Sub-X

Hornady logoby Hornady

Sub-X
Contains lead
SKU: o_3148
Twist: 1:11.5

The Hornady Sub-X bullet is engineered for subsonic velocities, featuring a progressive design that includes a polymer Flex Tip insert within a long cavity. This allows for reliable expansion at lower speeds, a critical factor when working with subsonic loads. Its construction utilizes a lead core encapsulated by a precision-drawn jacket, ensuring consistent weight retention and enhanced penetration. Expansion is moderate and controlled, maximizing terminal performance while maintaining deep penetration, suitable for medium-sized game. With typical calibers being 300 Blackout and similar, this bullet is optimized for hunters targeting deer and hogs at closer ranges where subsonic ammunition is preferable. The Sub-X's design reduces the sonic crack while still delivering terminal effectiveness, ideal for suppressor use. For handloaders, the bullet's uniform build and the performance-driven design simplify load development, ensuring repeatable results across various load recipes, making it a versatile choice for custom load applications.

Specifications

Weight

255 gr (16.52 g)

Diameter

0.311″ (7.91 mm)

Sectional Density

0.375

BC G1

0.365

Type

Sub-X

Min. Twist

1:11.5

Related Load Recipes

Load recipes using .3115 | 255gr | Sub-X are available in the following cartridges:

Community Load Data for .3115 | 255gr | Sub-X

Loads for .3115 | 255gr | Sub-X from our community:

2 loads

cartridgePowderBarrel (in)Charge (gr)OAL (in)Max. Pressure (psi)Muzzle Velocity (fps)
7.62 x 39 (M43) RussianHodgdon CFE BLK16.015.52.19050662 (98%)1480
7.62 x 39 (M43) RussianHodgdon CFE BLK16.015.02.19046282 (90%)1440