Элмер Кеитс Elmer Merrifield Keith (March 8, 1899 – February 12, 1984) was an Idaho rancher, firearms enthusiast, and author. Keith was instrumental in the development of the first magnum revolver cartridge, the .357 Magnum, as well as the later .44 Magnum and .41 Magnum cartridges. Keith was a prolific writer, writing both books and magazine columns. During the 1950s and 1960s, he was especially well known for his regular monthly columns he wrote for Guns & Ammo magazine, and American Rifleman typically exploring the performance of the latest new gun offerings, especially those firing large, heavy bullets pushed to high velocities. He has influenced modern gun writers such as Mike Venturino and John Taffin. -Sixgun Cartridges and Loads. Onslow County, N.C., Small Arms Technical Publishing Co, 1936. [Riling 2200] -Big Game Rifles and Cartridges. Onslow County, N.C., Small Arms Technical Publishing Co, 1936. [Riling 2199] -Keith's Rifles for Larger Game Huntington, WV: Standard Publications, 1946. [Riling 2551] -Elmer Keith's Big Game Hunting. Boston: Little, Brown, 1948. [Riling 2648] -Shotguns. Harrisburg, Pennsylvania: Stackpole & Heck, 1950. [Riling 2726] -Sixguns. Harrisburg, Pennsylvania: Stackpole & Heck, 1955. -Guns and Ammo for Hunting Big Game, with John Lachuk. Los Angeles, Calif. : Petersen Publishing Co.,1965. -Safari. La Jolla, Calif: Safari Publications, 1968. -Hell, I Was There (autobiography). Los Angeles, Calif.: Petersen Publishing Co., 1979. http://www.elmerkeithshoot.org/