Ackley Improved version of the .35 Whelen; blown-out case with sharper shoulder adds meaningful velocity for large and dangerous North American game.
Type: Rifle
Introduced: 1955, United States
Parent case: .35 Whelen
Standardization: Proprietary
Bullet diameter: 0.358" (9.09 mm)
Rim type: Rimless
Primer: Boxer Large Rifle
Production status: Active
Also known as: .35 Whelen AI
History: The .35 Whelen AI takes the already-capable .35 Whelen and reshapes the case for improved powder efficiency, typically adding 80–120 fps over the parent cartridge. Popular among hunters who pursue elk, moose, and bear at moderate ranges and want the extra authority of an improved case.