Barnes .270 Caliber 140 Grain TSX Boat Tail bullets are premium component projectiles built around Barnes’ Triple-Shock X design. MPN 30266 identifies the .277-inch diameter, 140-grain TSX Boat Tail configuration supplied 50 bullets per box.
The TSX uses monolithic copper construction and multiple engineered grooves cut into the bullet shank. These grooves reduce bearing surface and copper fouling while supporting the accuracy, controlled expansion and penetration associated with the TSX family.
The 140-grain projectile uses a boat-tail profile and belongs to the standardized .270 Caliber component-bullet family. Its nominal bullet diameter is .277 inch.
These are component bullets intended for metallic cartridge reloading and are not loaded ammunition. Each box contains 50 projectiles.
Key Features
- Triple-Shock X (TSX) design
- Monolithic copper construction
- Pressure-relief grooves in the bullet shank
- Boat-tail profile
- .277-inch bullet diameter
- 140-grain projectile weight
- 50 component bullets per box
Manufacturer Specifications
- Manufacturer: Barnes
- MPN: 30266
- Caliber: .270 Caliber
- Bullet Diameter: .277"
- Bullet Weight: 140 grains
- Bullet Type: TSX
- Bullet Style: Boat Tail
- Construction: Monolithic copper
- Quantity: 50 bullets per box






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