Elmer Keith's Big Game Rifles and Cartridges is a foundational work in the field of hunting ballistics and firearm performance, written by one of the most influential figures in American shooting sports. Keith, a passionate outdoorsman and gunsmith, brings together years of personal experience in hunting the largest and most dangerous animals of North America and Africa, offering critical insights into rifle selection, cartridge design, terminal ballistics, and field performance. In this comprehensive manual, Keith evaluates dozens of rifles and loads, explaining their strengths, limitations, and ideal applications in real-world scenarios. He dissects the kinetic energy, penetration, bullet construction, and trajectory of popular cartridges like the .30-06, .375 H&H, .45-70, and many others, offering no-nonsense advice for hunters who demand reliability in extreme conditions. But Keith is not merely a technician—he is a storyteller. His accounts of grizzly bear charges, moose stalks, and African safaris are woven throughout the technical exposition, adding life, tension, and credibility to his recommendations. He champions heavy bullets, high velocity, and precise shot placement, making a compelling case for practicality over marketing hype. While some of the gear may be dated, the principles remain essential. This book continues to inform modern hunters and reloaders, offering timeless knowledge from a man who helped shape modern big game hunting standards.