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Old February 5, 2021, 01:09 PM   #18
Mike Irwin
Join Date: April 13, 2000
Location: Northern Virginia
Posts: 40,794
"So the Canadians bought guns that would not take Canadian ammo but the British did?"


Guns marked .455 Eley have .455 Webley Mk I chamber dimensions.

That makes them usable with:

.455 Eley or .455 Colt marked commercial ammunition (long case)
.455 Webley Mk I ammunition (long case)
.455 Webley Mk II and later marks (short case)
.450 Adams revolver (obsolete)

and, POSSIBLY, depending on the characteristics of the individual gun

.476 Enfield (obsolete)

Just found this interesting tidbit...

"Technically, as pointed out by Col. Robert D. Whittington III, Ordnance Corps, U.S. Army in Colt .450, .455 and .476 Caliber Revolvers, .455 Eley is not the correct designation but Colt marked the barrels of the New Service as such. According to Whittington, Colt did this because the ammunition Colt acquired for testing New Service revolvers was made by Eley. "

It appears that only Colt marked its revolvers as .455 Eley, and did so from the start of their commercials sales to Canada in the early 1900s prior to World War I.

Smith & Wesson, upon receipt of contracts from Britain and Canada both during World War I, marked its guns with only .455. I'm not 100% sure which chamber length S&W used, but I suspect that it was for the shorter Mk II cartridge.
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