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Back in the day, the Colt Richards-Mason conversion, and the Henry rifle, shot the same 44 colt round, making them the first rifle-pistol combination to take the same cartridge.



I did indeed have that wrong. The henry round was used in early conversions, in the late 1860s.

http://gunsmagazine.com/old-west-44s/

Even the peacemaker was chambered for the henry round from 1875-1880

https://en.wikipedia.org/wiki/Colt_Single_Action_Army

The 44 colt didn't surface until 1872 or so.

https://en.wikipedia.org/wiki/.44_Colt

https://en.wikipedia.org/wiki/.44_Henry


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