Why weren't Winchester 1873 Rifles Chambered for 45 Colt in the 19th Century?

I am often asked why Winchester lever action rifles weren’t chambered for the .45 Colt round in the 19th century.

They wonder this because modern-made reproductions of those rifles are often chambered for the .45 Colt cartridge today.

In this video I’ll tell you the reason for that.

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