The .280 Ackley Improved cartridge was developed by Parker Otto (P.O.) Ackley, a wildcatter pursuing superior performance solutions much like Roy Weatherby himself. The cartridge improves upon the .280 Rem by increasing the shoulder angle to 40 degrees, which boosts powder capacity. Weatherby ammunition is recognized for exceptional ballistics and velocity, and their .280 AI offerings uphold those standards.
This load features 139 grain Hammer Bullets, manufactured on a CNC lathe from a unique solid copper blend engineered for maximum terminal performance. Each bullet is weighed and micrometer measured during production to ensure exceptional consistency and quality control. The hollow point design initiates expansion upon impact, shedding petals while the bullet’s remainder stays intact with a blunt front to create an optimal wound channel. Hammer Custom Bullets are specifically designed to optimize Weatherby’s flat shooting cartridges.
