Firing a unique 0.461″ diameter bullet, the 461 Gibbs designed by British gunsmith George Gibbs for use in his single shot rifles, although apparently some double rifles were also chambered for this cartridge. 

We do not carry this case as a stock item but it can be special ordered from Bertram.  If you are interested in obtaining this brass contact us and we will provide details on the ordering process.  The price is per 20 cases and the shipping weight is 415 grams.