.17 Mach IV

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The .17 Mach IV is a wildcat centerfire rifle cartridge, based on the .221 Remington Fireball case, necked down to fire a .172 bullet. Introduced in 1962 by Vern O’Brien^[1] it offered an easy case conversion and good ballistics^[2].

The name Mach IV comes from the claim that bullets can reach 4000 fps^[3].

The .17 Mach IV became very popular with varmint hunters, so much so that in 2007 Remington introduced its own very similar version, the .17 Remington Fireball^[4].

[edit] See also

• .17 Remington Fireball
• .221 Fireball
• 4 mm caliber
• List of rifle cartridges

[edit] References

1. ^ 6mmBR 17 Caliber Wildcats
2. ^ Barnes, Frank C., Cartridges of the World, 7th Edition, p171
3. ^ Which .17? by Jim Saubier
4. ^ Remington Fireball page