6x47mm (6mm-222 Remington Magnum)
Historical Notes:
Mike Walker is responsible, at least in part, for this 6mm caliber cartridge. A
note from him dated July 25, 1963, said that Bob Hutton asked him for a rifle
using this case after Mike told him, "It would probably be more accurate
than anything available at the time (1961) in the 6mm." Used primarily for
benchrest competition, cases can be made by simply necking up 222
Remington Magnum brass to 6mm. According to Walker, best accuracy is
obtained with 70 to 75 grain bullets. The 6x47mm has lost popularity recently to
the 6mm PPC and
the 6x45mm (the
223 Remington necked up to 6mm). Federal
made cases in this caliber in the late 1970's, but has since discontinued them.
General Comments:
Although used primarily for competition, the 6x47mm is a good mid range varmint
and small game number. It is not a good choice for deer as 100 grain bullets can
not be driven at sufficient velocity to assure clean kills.
Source: Cartridges of the World
| 6x47mm (6mm-222 Remington Magnum) Reloading Data | ||||
|---|---|---|---|---|
| Bullet (grs.) | Powder / (grs.) | MV | ME | Source |
| 70-75 HP | IMR-4198 / 23.5 | 3000 | 1499 | n/a |
| 75 | 3031 / 26.5 | 2650 | 1165 | Ackley |
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