Matches in DBpedia 2014 for { ?s ?p The .17 Mach IV is a wildcat centerfire rifle cartridge, based on the .221 Remington Fireball case, necked down to fire a .172 bullet. The cartridge was introduced in 1962 by Vern O’Brien. The cartridge offered an easy case conversion and good ballistics, but could not compete against the .17 Remington.The name, Mach IV, comes from the claim that the bullets can reach 4,000 ft/s.. }
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- .17_Mach_IV comment "The .17 Mach IV is a wildcat centerfire rifle cartridge, based on the .221 Remington Fireball case, necked down to fire a .172 bullet. The cartridge was introduced in 1962 by Vern O’Brien. The cartridge offered an easy case conversion and good ballistics, but could not compete against the .17 Remington.The name, Mach IV, comes from the claim that the bullets can reach 4,000 ft/s.".