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| $ 3.75 per Cartridge |
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| 17 Mach IV |
| ("Parent Cartridge") |
| Introduced in the 1960's by O'Brien Rifle Company of Las Vagas, Nevada. Basically this is a 221 Fireball case necked down for 22 caliber to .17 caliber, and increasing the angle for the case neck from 23 degrees to 30 degrees. This is a 9 step process! Lot of Labor! |
| Wildcat |
| 17 Mach IV |
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| $ 5.75 Cartridge in Labeled Sleeve |
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| Cartridge |
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| .221 Remington Fireball |