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.280 Ackley Improved
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Caliber Specifications:
Caliber: | .280 Ackley Improved |
Standard / Datasheet: | SAAMI |
Bullet Diameter: | 0.284" | 7.21mm |
Primer Size: | Large Rifle (LR) |
Max. Case Length: | 2.540" | 64.52mm |
Max. Cartridge Length / OAL: | 3.330" | 84.58mm |
Max. Standardized Pressure: | 64977 psi | 4480 bar |
Case Capacity: | 74.0 Grains of Water | 4.80 cm3 |
CID: | CID_285 |
Last updated: | 2/20/2025 |
- The .280 Ackley Improved is a modern cartridge based on the original .280 Remington. It was designed by the renowned gunsmith, P.O. Ackley, in the early 1940s and has since become a popular choice for long-range hunters seeking improved accuracy and higher velocities than what is offered by standard factory rounds.The .280 AI offers increased case capacity due to its slightly longer case length and sharper shoulder angle. This allows it to get more of its propellant behind the bullet, resulting in higher velocities compared to the original .280 Remington. This increased velocity can result in flatter trajectory and better terminal performance on target at extended ranges.
Weight vs. Velocity - Suitable Bullets for this Caliber
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Barrel Length Variation vs. Velocity - by Bullet Weight
.280 Ackley Improved load data available with the following bullets:
(most popular first)
Filter by Bullet Weight (Grains)
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