Barnes TSX (Triple-Shock X) 458 caliber 300-grain flat base bullets (Barnes part no. 30615) are built from solid copper for dangerous-game and big-bore hunters who need maximum penetration with zero fragmentation. Precisely engineered relief rings cut into the bullet shank act as pressure valves as the bullet travels down the bore, which reduces pressure spikes for higher attainable velocity while cutting down on copper fouling. Barnes rates the TSX design at roughly 28 percent deeper penetration than a comparable lead-core bullet, with the all-copper construction retaining essentially all of its original weight through the target. For 458-caliber hunters chasing heavy, thick-skinned game, that combination of penetration and weight retention is the whole point of the design.

Key Specifications

• Bullet diameter is .458 caliber, built for big-bore dangerous-game rifles.
• Bullet weight is 300 grains.
• Flat base design.
• All-copper construction with no lead core, eliminating fragmentation on impact.
• Engineered relief rings on the shank reduce bore pressure and copper fouling.
• Rated for roughly 28 percent deeper penetration than comparable lead-core bullets.
• Delivers maximum weight retention through the target.
• Sold 20 bullets per box.
• Ships at approximately 0.95 lb.

Frequently Asked Questions

Why choose an all-copper bullet like the TSX over a lead-core bullet? The solid-copper build eliminates fragmentation and retains essentially all of its weight, giving deeper, more reliable penetration on heavy game.

What do the rings cut into the bullet shank do? They act as relief valves as the bullet travels down the bore, reducing pressure and copper fouling while allowing higher velocity loads.

How many bullets are in a box? 20 bullets per box.

Buy the Barnes TSX 458 Caliber 300gr Flat Base Bullets

Load a bullet built for maximum penetration on the heaviest game you hunt. Order from Barnes through our reloading bullets lineup, with fast shipping from our Lubbock, Texas gun shop.