Description
The Weatherby 280 AI 139gr Hammer load, Weatherby item M280A139HCB, is a 20 round box of 280 Ackley Improved ammunition from the Weatherby Select Plus line, loaded with a 139 grain Hammer Custom bullet rated at 3050 fps with 2871 ft-lbs of muzzle energy.
Weatherby 280 AI 139gr Hammer Overview
Weatherby loads this cartridge to the same standards as its own magnum cartridges, using premium bullets and carefully developed loads. The Select Plus line pairs Weatherby performance with premium hunting bullets from makers such as Barnes, Hornady, Swift, Berger and Hammer. Each load is built for hunters who want consistent accuracy and dependable terminal performance.
Bullet Design
The Hammer Custom bullet is a lead-free copper design with a hollow cavity. On impact the nose sheds petals that create secondary wound channels while the shank drives deep in a straight line. Its low bearing surface also helps keep pressures in check, allowing high velocity with excellent accuracy.
Intended Use
This load is built for deer, elk and other big game across a wide range of distances, making it a versatile choice for western and mountain hunts. Always confirm your zero with this load before the hunt, and check your state regulations for any caliber or bullet requirements.
Firearm Compatibility
This ammunition is made for rifles chambered in 280 Ackley Improved, such as Weatherby Mark V and Model 307 rifles and other rifles built for the cartridge. Always check the caliber marking on your barrel before loading, and never fire it in a rifle chambered for a different cartridge.
About Weatherby
Weatherby has built high-performance rifles and ammunition since 1945. Its magnum cartridges are known for speed, reach and a flat trajectory, and the company continues to develop new cartridges and loads for hunters around the world.
Recoil and Shootability
Recoil is moderate to firm for a magnum-class load. A good recoil pad and solid shooting positions help you shoot it accurately at longer range.
Choosing a Bullet
Weatherby offers several bullets in most of its cartridges so hunters can match the load to the game. Copper bullets such as the Barnes and Hammer designs are lead-free and hold their weight for deep penetration, bonded bullets like the Swift Scirocco combine toughness with a high ballistic coefficient, and long-range designs such as the Berger Elite Hunter and Hornady ELD-X are built to expand at extended distances. Lighter bullets shoot flatter, while heavier bullets carry more momentum for large game.
Sighting In
Zero your rifle with the exact load you plan to hunt with, and confirm your drop at several distances. Magnum cartridges shoot flat, but every rifle is different, and a few shots at 200, 300 and 400 yards tell you exactly where this load lands before the season opens.
Shot Placement and Range
Fast, flat-shooting loads make longer shots more forgiving, but shot placement still matters most. Know your rifle’s drop at the distances you expect to shoot, practice from field positions, and pass on shots beyond your proven ability.
Why Shooters Choose Weatherby Ammo
Weatherby ammunition is loaded to match the performance its cartridges were designed for, using premium bullets that perform across the full range of hunting distances. Hunters choose it for consistent velocities, strong accuracy and bullets that hold together on tough game.
Storage and Care
Store ammunition in a cool, dry place in its original boxes, away from solvents and lubricants that can contaminate primers. Inspect rounds before loading, and set aside any with dents, loose bullets or corrosion.
Specifications
- Brand: Weatherby
- Line: Select Plus
- Item number: M280A139HCB
- Caliber: 280 Ackley Improved
- Bullet weight: 139 grain
- Bullet: Hammer Custom
- Muzzle velocity: 3050 fps
- Muzzle energy: 2871 ft-lbs
- Count: 20 rounds per box
- UPC: 747115452675
Before You Buy
Federal law requires buyers of rifle ammunition to be at least 18 years old when buying from a licensed dealer. Some states and cities restrict ammunition purchases, require background checks or limit shipping, so check your local rules before you order.
Who It Is For
The Weatherby 280 AI 139gr Hammer is a great fit for big game hunters who shoot a 280 Ackley Improved rifle and want premium, high-performance ammunition from the company behind the cartridge.
Buy the Weatherby 280 AI 139gr Hammer at MAG5 Firearms
MAG5 Firearms is a family-owned FFL in Collegeville, Pennsylvania. Order the Weatherby 280 AI 139gr Hammer online and we will ship it to you where state and local law allow, or browse our full selection of ammunition for more rifle loads. For factory details, visit Weatherby.
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