Description
Federal Premium loaded the Barnes TSX with one purpose in mind: giving you a hunting round that performs reliably at any distance without compromise. This proven all-copper hollow point groups tightly whether you're dialing in at the range or threading a shot through canyon winds at distance. The 165 grain weight at 3050 fps puts solid energy downrange for standard big game scenarios.
Barnes TSX Copper Construction and Weight Retention
The monolithic all-copper design means there's no lead core to separate from a jacket, and no fragmentation to waste energy or performance. This translates directly to near-100 percent weight retention on impact. The controlled expansion starts when fluid enters the hollow nose cavity, forcing the bullet open along internal grooves that peel the nose into four sharp petals. You get significant wound cavity creation without the bullet coming apart, which means deeper penetration through bone and hide than you'd expect from the bullet weight alone.
Long-Range Accuracy and Reduced Barrel Fouling
The signature relief grooves cut into the TSX shank do more than look aggressive. They reduce bearing surface pressure and minimize the copper fouling that plagued older solid copper designs, keeping your barrel cleaner between cleanings. Those same grooves improve seating consistency and contribute to the tight grouping this load is known for, making it equally at home on a precision rifle or a hunting rifle pushed out to extended range. The nickel-plated brass cases add another layer of reliability through tougher casings that handle repeated loading cycles.
Big Game Performance
This cartridge combination delivers what matters most: a bullet that hangs together, expands predictably, and penetrates deep enough to reach vitals from realistic hunting angles. Whether you're hunting whitetail in brushy terrain or taking elk at distance, the 165 grain TSX has the velocity to initiate reliable expansion and the mass to drive through tough conditions.
Key Specifications
- Caliber: .300 Winchester Magnum
- Bullet Weight: 165 grain
- Bullet Type: Barnes Triple-Shock X (TSX) – All-Copper Monolithic
- Muzzle Velocity: 3050 fps
- Muzzle Energy: 3408 ft-lbs
- Ballistic Coefficient: 0.398
- Case Material: Nickel-Plated Brass
- Rounds per Box: 20
- Cartridge Length: 1.301 inches
- Manufacturer: Federal Premium Ammunition
- Model/Part Number: P300WR
- UPC: 029465098544
- Application: Big Game Hunting, Long Range
- Weight Retention: Nearly 100%
What’s Included
- 20 rounds of Federal Premium Barnes TSX ammunition
- Factory sealed box with manufacturer labeling and lot traceability
Frequently Asked Questions
How does the Barnes TSX bullet design improve accuracy compared to standard hunting rounds?
The grooved shank of the TSX bullet reduces bearing surface pressure against the barrel, which minimizes inconsistencies and improves seating. These relief grooves also reduce copper fouling in the bore, which means you spend less time cleaning and more time shooting consistently. The end result is tighter long-range groups than many comparable hunting loads.
Will the 165 grain Barnes TSX work for elk-sized game at distance?
Yes. The monolithic all-copper construction retains nearly 100 percent of its weight, so a 165 grain TSX performs similarly to much heavier conventional bullets. At 3050 fps, this load has the velocity needed to initiate reliable expansion and penetrate deep enough to reach vitals. Real-world data shows hunters regularly take elk with this exact combination at reasonable hunting ranges.
Is the all-copper construction of these rounds a disadvantage for shorter distances?
No. The TSX is designed to open reliably across a wide velocity range, from point-blank to extended distance. The controlled expansion happens when fluid enters the hollow nose cavity, not from a fragile tip or jacket separation. At typical hunting ranges under 300 yards, the 165 grain TSX expands completely and delivers devastating terminal performance.
How much fouling should I expect from Federal's Barnes TSX ammunition?
The Accu-Grooves relief bands on modern TSX bullets significantly reduced the copper fouling problems found in older solid copper designs. Most users report little to no more fouling than they'd see with traditional cup-and-core hunting ammunition, making barrel cleaning routine rather than a constant chore between range sessions.




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