enables it to fire long, heavy bullets with a high sectional density. This made it popular in Africa, where it was used on animals up to and including elephants, for which it was particularly favoured by noted ivory hunter W.D.M. "Karamojo" Bell, who shot about 800 African elephants with 1893 pattern 7×57mm military ball ammunition using Rigby Mauser 98 rifles, when most ivory hunters were using larger-caliber rifles. Bell selected the cartridge for moderate recoil, and relied on the long round-nosed military full metal jacket bullets for penetration. The 7×57mm was also the favored cartridge of Eleanor O'Connor, wife of famous hunter and author Jack O'Connor. Eleanor accompanied her husband on multiple hunting expeditions all over the world, killing small and large game with the 7×57mm. Jack O'Connor also made extensive use of the round and remarked that "I think I have seen more game killed with fewer shots from this modest little cartridge than with any other." Though not as popular today, the 7×57mm is still produced by most major ammunition manufacturers and many modern rifles are available chambered for the cartridge. The cartridge is more popular in Europe than in the United States and most European gunmakers chamber rifles in 7×57mm. (Although they may not export them to the USA.) The 7×57mm round was also used by the Indian hunter and conservationist Jim Corbett to put down the infamous man-eating Leopard of Rudraprayag besides a few other Man-Eaters of Kumaon. Corbett's writings mention using the .275 Mauser-Rigby rifle with attached torch to despatch the leopard on a dark summer night in May 1926. For man-eating tigers, Corbett preferred the .450/400 Nitro Express cartridge in a double-barrelled configuration from W.J. Jeffery & Co as the .400 Jeffery Nitro Express rifle but retained the Mauser-Rigby as a backup weapon. The 7×57 is able to handle a wide range of projectile weights, is easy to reload, has relatively mild recoil, and is accurate. Some rifle metallic silhouette shooters use 7×57. Military use The military of the Kingdom of Spain adopted the Mauser Model 1893 rifle. It was chambered for the new 7×57mm Mauser cartridge. The original cartridge featured a long, round-nose, full-metal-jacketed bullet with a muzzle velocity of about with muzzle energy from a barreled rifle. For the late 19th century, these ballistics were impressive, and the loading provided a fairly flat trajectory combined with excellent penetration. At the same time,