.30 Ackley Short Magnum No. 1 (P.O. Ackley Data)

.30 Ackley Short Magnum No. 1 (P.O. Ackley Data)

The .30 Ackley Short Magnum No. 1 was one of several experimental and highly specialized wildcat cartridges developed by legendary gunsmith and cartridge designer P.O. Ackley. Built from shortened belted magnum brass derived from the Holland & Holland family of cartridges, the No. 1 Short Magnum was designed to deliver magnum-level .30 caliber performance in a more compact case design. Ackley experimented heavily with efficient powder capacity, steep shoulder angles, and reduced body taper in an effort to maximize velocity while maintaining reliable feeding and strong case life.

The No. 1 version was notably shorter than many traditional magnum cartridges of its era and represented Ackley’s continued interest in creating high-performance cartridges that pushed beyond standard factory offerings. Unlike later commercially successful short magnums, Ackley’s work was entirely part of the wildcatting world, requiring custom chambering, specialized dies, and hand-formed brass. Cases were commonly formed from belted magnum brass through trimming and resizing operations. Because of the shortened case dimensions, standard .30-06 chambers could not simply be rechambered without additional barrel work, helping prevent accidental chambering of incorrect ammunition.

Performance from the .30 Ackley Short Magnum No. 1 was impressive for its time, especially considering the cartridge’s compact dimensions. It was capable of driving common .30 caliber hunting bullets at velocities approaching larger magnum cartridges while using a shorter powder column. Like many Ackley designs, the cartridge emphasized experimentation and efficiency as much as outright speed. Though it never became a mainstream commercial cartridge, it remains an interesting example of the innovation taking place among American wildcatters during the mid-twentieth century.

The .30 Ackley Short Magnum No. 1 also helped lay conceptual groundwork for later generations of short magnum cartridges that would eventually become commercially successful decades later. Modern shooters familiar with compact magnum designs can still see elements of Ackley’s philosophy reflected in contemporary short-action magnum cartridges.