IN EVERY ERA of the firearms and shooting history, there have been standout figures who defined the direction and development of the industry. Eliphalet Remington, Benjamin Tyler Henry, Oliver Winchester, John Marlin, Daniel Wesson, Hiram Maxim, Christian Sharps, Samuel Colt, John M. Browning and John C. Garand; these are a few examples of the inventors. Col. Townsend Whelen, Elmer Keith, and Jack O’Connor are examples of influencers of their time. One figure, Parker Otto Ackley, who went by “P.O.” for most of his life, isn’t thought of as frequently. However, beginning with his experience as a gunsmith in 1936, Ackley made numerous contributions to cartridge design and performance throughout his life. His work and ideas can still be seen today, more than 30 years after his death.
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