Barnes .375 Caliber 270 Grain TSX Flat Base bullets are premium component projectiles built around Barnes’ Triple-Shock X design. MPN 30489 identifies the .375-inch diameter, 270-grain TSX Flat Base configuration supplied 50 bullets per box.
The TSX uses monolithic copper construction and multiple engineered grooves cut into the bullet shank. Barnes designed these grooves to reduce bearing surface and copper fouling while supporting the accuracy, controlled expansion and penetration associated with the TSX family.
This 270-grain projectile uses a flat-base profile and belongs to the standardized .375 Caliber component-bullet family. Its verified nominal bullet diameter is .375 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
- Flat-base profile
- .375-inch bullet diameter
- 270-grain projectile weight
- 50 component bullets per box
Manufacturer Specifications
- Manufacturer: Barnes
- MPN: 30489
- Caliber: .375 Caliber
- Bullet Diameter: .375"
- Bullet Weight: 270 grains
- Bullet Type: TSX
- Bullet Style: Flat Base
- Construction: Monolithic copper
- Quantity: 50 bullets per box






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