Quick Answer
The Barnes TSX offers slightly better expansion than the TTSX, with a 10-15% increase in expansion ratio at impact velocities below 2,000 feet per second.
Monolithic Bullet Design
The TSX and TTSX are both monolithic bullets, meaning they have a single piece of copper instead of multiple layers. This design provides improved expansion and penetration by allowing the bullet to expand more consistently, regardless of the impact angle.
Expansion Characteristics
The TSX has a rounded nose profile, which helps it to expand more uniformly than the TTSX, which has a more pointed nose. As a result, the TSX tends to expand 10-15% more than the TTSX at lower impact velocities, but the difference is less pronounced at higher velocities. For example, at an impact velocity of 1,500 feet per second, the TSX will typically expand to 0.75-0.80 inches in diameter, while the TTSX will expand to 0.65-0.70 inches.
Real-World Performance
In real-world hunting scenarios, the TSX has proven to be a reliable choice for taking down large game at close to medium ranges. Its consistent expansion and penetration characteristics make it well-suited for a variety of hunting applications. For example, a 180-grain TSX bullet fired from a 6.5 Creedmoor rifle at 2,700 feet per second will typically penetrate 12-18 inches of tissue before coming to rest, providing a high degree of lethality.
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