Description
The Swift A-Frame is widely considered the toughest lead-core bullet on the market, and this .375 caliber 250 grain semi-spitzer is a perfect example of why professional hunters keep reaching for it. It carries a bonded front core and a distinctive cross-member wall of pure copper that separates the front and rear lead, so the nose opens up while the back stays locked in place to keep driving forward. The result is the kind of deep, straight penetration and big wound channel you want when the animal on the other end is large and capable of fighting back.
What Sets the A-Frame .375 Bullet Apart
The magic is in the construction. Swift uses a progressively tapered pure copper jacket to control how fast the bullet expands, a lead core bonded with their proprietary process, and a protected rear core that gives the bullet momentum to punch deep. Field results back it up, with the A-Frame typically mushrooming to roughly twice its original diameter while holding onto 95 percent or more of its original weight. That combination is why guides chasing Cape buffalo, brown bear, and other thick-skinned game trust these bullets to perform the same way shot after shot.
Loading the .375 250 Grain A-Frame
This bullet measures 0.375 inches in diameter, weighs 250 grains, and carries a G1 ballistic coefficient of 0.271 with a sectional density of 0.254. The semi-spitzer nose is shaped to handle recoil inside a magazine without deforming, which matters in a hard-kicking rifle. It initiates expansion down around 1,650 fps and holds together past 3,000 fps, giving handloaders a wide, forgiving velocity window. It is a natural fit for the .375 H&H and plays nicely with other .375 chamberings like the .375 Ruger, .375 Weatherby, and .375 Win. Work your loads up carefully using current published data and you will have a round that shoots clean groups and hits hard.
If you are building a dangerous game or heavy plains game load and want a bullet that gets the job done without drama, the Swift A-Frame earns its reputation.
Key Specifications
- Manufacturer: Swift Bullet Co.
- Caliber: .375
- Bullet Diameter: 0.375 in
- Bullet Weight: 250 gr
- Bullet Style: A-Frame Semi-Spitzer
- Ballistic Coefficient (G1): 0.271
- Sectional Density: 0.254
- Construction: Bonded front core, cross-member copper jacket
- Expansion Range: 1,650 fps to 3,000+ fps
- Weight Retention: 95%+
- Quantity: 50 per box
- Manufacturer Part Number: 372503
- UPC: 713351372503
What’s Included
- 50 Swift A-Frame .375 caliber 250 grain semi-spitzer rifle bullets
Frequently Asked Questions
What game are the Swift A-Frame .375 250 grain bullets best for?
These are heavy rifle bullets built for large and dangerous game, which is exactly where the A-Frame has earned its reputation. The bonded core and cross-member design deliver deep penetration on thick-skinned animals like Cape buffalo, along with big bears and heavy plains game. Loaded in a .375 H&H, this is a well-rounded big-game setup.
How much do these A-Frame bullets expand and retain?
Swift A-Frames are known for controlled expansion to roughly twice their original diameter while holding 95 percent or more of their weight. The protected rear core keeps the bullet together so it keeps driving forward after it mushrooms. That consistency is a big reason guides and serious handloaders favor them.
What velocity range do these bullets perform in?
The A-Frame initiates expansion on the low end around 1,650 fps and stays together past 3,000 fps on the high end. That wide window gives you dependable terminal performance whether you are taking a close shot or reaching out a bit. It makes load development more forgiving across different .375 chamberings.
Are these bullets only for the .375 H&H Magnum?
No. The 0.375 inch diameter works across the .375 family, including the .375 Ruger, .375 Weatherby Magnum, .375 Winchester, and more. Always match your load to current published data for your specific cartridge and rifle.





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