I don't have anything that cool.
But I did have a empty Gatling gun case that was picked up in a field where the RCMP tested a Gatling gun in preperation for an attack against what they called the North-West Rebellion.
I put a .45 cal cast bullet in it to show what the loaded cartridge would look like.
The cartridge is only slightly larger then the 45-70 which replaced it.
A 45-70 round could be fired in a 45 gatling but not the other way round.
I collect hunting cartridges and had only a passing interest in it so I offered it to the Canadian Military Museum.
They declined it saying that cartridge was never used by the Military here, which is partially true.
The 45 gatling was only used by the military once and the gun did not belong to Canada, it belonged to a US military collector and was on loan for this one event.
It wasn't even operated by a Canadian while it was here.
It was operated by a Major Arthur L. Howard of the Connecticut National Guard.
Colonel Gat as he was known here was sent north by the Colt Firearms Company to operate that Gatling gun on behalf of the owner who did not want a foreigner operating his gun.
Arthur L. Howard remained in Canada when the Gatling gun was sent back to it's owner.
He bought out a small ammunitions plant that he renamed The Canadian Cartridge company.
The company went through a number of name changes including DCCo, Dominion, Imperial and eventually IVI.
They also produce the Canuk line of ammunition as well as other lesser brands.
They closed their doors for good in the 1980s after a number of law suits arising from hang fire injuries.