|This article needs additional citations for verification. (January 2013)|
|.475 A&M Magnum|
|Place of origin||United States|
|Parent case||.378 Weatherby|
|Bullet diameter||.475 in (Script error mm)|
|Neck diameter||.502 in (Script error mm)|
|Shoulder diameter||.560 in (Script error mm)|
|Base diameter||.584 in (Script error mm)|
|Rim diameter||.533 in (Script error mm)|
|Case length||2.90 in (Script error mm)|
|Overall length||3.75 in (Script error mm)|
|Primer type||Boxer large rifle|
|400 gr (Script error g)||3,227 ft/s (Script error m/s)||9,034 ft·lbf (Script error J)|
|500 gr (Script error g)||2,980 ft/s (Script error m/s)||9,900 ft·lbf (Script error J)|
|600 gr (Script error g)||2,500 ft/s (Script error m/s)||8,040 ft·lbf (Script error J)|
|Source(s): Barnes & Amber|
The .475 A&M Magnum is a rifle cartridge developed in the United States. At the time of its development it was considered the most powerful sporting rifle cartridge ever developed. However, as the .475 A&M Magnum was a wildcat cartridge, the .460 Weatherby Magnum continued to be the most powerful commercial sporting cartridge available.
The cartridge and rifle were designed by the Atkinson & Marquart Rifle Co. of Prescott, Arizona, by necking up the then new .460 Weatherby Magnum to accept a .475 in (Script error mm) diameter bullet. Fred N. Barnes, the founder of Barnes Bullets for whom the first rifle chambered for this cartridge was made, supplied the bullets. According to anecdotes, Fred Barnes gathered a group of people to demonstrate the rifle. The rifle was fired at the base of a small tree which was uprooted while Fred Barnes who had been shooting from a crouched position on a gravel bed had slid a few feet and ended on his back due to the recoil.
The .475 A&M Magnum was never available commercially, and was only Barnes Bullets and Custom Brass and Bullets provided bullet for the cartridge. Only a small number of rifles have been chambered for this cartridge. Brass is easily fireformed using .460 Weatherby Magnum brass. Dies are available from Custom Brass and Bullets.
- Barnes, Frank C., ed. by John T. Amber. ".475 A&M Magnum", in Cartridges of the World, pp. 142–3. Northfield, IL: DBI Books, 1972. ISBN 0-695-80326-3.
|This ammunition-related article is a stub. You can help Wikipedia by expanding it.|