The .256 Gibbs Magnum is an obsolete rimless bottleneck centerfire rifle cartridge developed by George Gibbs of Bristol and introduced in 1913. == Overview == The .256 Gibbs Magnum was designed and introduced by George Gibbs in 1913 for use in their own Mauser style sporting rifles.
The .256 Gibbs Magnum is an obsolete rimless bottleneck centerfire rifle cartridge developed by George Gibbs of Bristol and introduced in 1913. == Overview == The .256 Gibbs Magnum was designed and introduced by George Gibbs in 1913 for use in their own Mauser style sporting rifles.
Source: Wikipedia ".256 Gibbs Magnum" · CC BY-SA 4.0
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