Description
The Swift A-Frame has earned its reputation as one of the toughest lead-core hunting bullets ever built, and this .25 caliber 120 grain version brings that performance to the quarter-bores. These bullets measure .257 inches in diameter, carry a ballistic coefficient of .382, and a sectional density of .260, making them a natural fit for the .25-06 Remington, .257 Roberts, .257 Weatherby, and similar rounds. The semi-spitzer profile is built to hold its shape under recoil in the magazine, so the nose stays true round after round.
What Sets the A-Frame Apart
The heart of this design is the bonded front core paired with a solid copper wall that separates it from the rear core. On impact, the front end mushrooms with controlled expansion to around double its diameter while the protected rear core drives deep penetration. The jacket is formed from pure copper rather than alloys, and it tapers progressively to regulate how fast the bullet opens across a wide velocity range. That rear core stays locked in place thanks to a thick wraparound jacket, which is why weight retention routinely lands above 95%.
Loading the .257" 120 gr A-Frame
Handloaders like these for building premium hunting loads where reliable terminal performance matters more than chasing the flattest trajectory. At 120 grains in .25 caliber, this bullet carries enough weight for deer, antelope, black bear, and tougher medium game without getting sluggish. Pair it with a quality powder suited to your cartridge, work up carefully, and you've got a dependable hunting round that behaves the same whether you catch game up close or stretch things out a bit.
Why Hunters Trust the Swift A-Frame
For decades the A-Frame has been the benchmark other bonded bullets get measured against. The combination of deep penetration, wide expansion, and heavy weight retention means fewer surprises in the field and clean, consistent results on game of all sizes.
Key Specifications
- Brand: Swift Bullet Company
- Bullet Line: A-Frame
- Caliber: .25 Caliber
- Diameter: .257"
- Bullet Weight: 120 gr
- Bullet Profile: Semi-Spitzer (AF/SS)
- Bullet Construction: Bonded jacketed lead, pure copper jacket
- Ballistic Coefficient (G1): 0.382
- Sectional Density: 0.260
- Quantity: 50
- Manufacturer Part Number: 251204
- UPC: 713351251204
What’s Included
- 50 Swift A-Frame .25 cal .257" 120 gr semi-spitzer bullets
Frequently Asked Questions
What cartridges can I load the Swift A-Frame .257" 120 gr bullet in?
This bullet uses the standard .257 inch diameter, so it works in popular quarter-bore cartridges like the .25-06 Remington, .257 Roberts, and .257 Weatherby Magnum. Always consult current load data for your specific cartridge and work your charges up from a safe starting point.
What makes the A-Frame different from a standard soft point?
The A-Frame uses a bonded front core with a solid copper cross wall separating it from a protected rear core. That design lets the front mushroom reliably while the rear drives deep penetration, with weight retention typically topping 95%. A standard soft point can shed more weight and penetrate less consistently on tough game.
Is this loaded ammunition or a reloading component?
These are reloading bullets only, sold as a component for handloaders. You'll need your own brass, primers, and powder to assemble finished cartridges.
How much does the A-Frame expand on game?
The A-Frame is built for controlled expansion to roughly twice its original diameter while holding onto the bulk of its weight. That balance of wide mushrooming and deep penetration is why it's trusted on everything from deer to larger medium game.





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