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**Mike Irwin** · February 9, 2021, 11:39 AM

The Eley/Webley round had a rim thickness of .039, while the .45 Colt had a rim thickness of .060.

Additionally, the width of the .45 Colt round as was slightly greater, so some counterboring would generally have been necessary unless it was a sloppy fit to begin with.

What's interesting is that the picture of the chambers appear to show the original chamber shoulder as a very faint line just before the current shoulder.

My guess is that your revolver did originally have shoulder chambers and wasn't bored straight through.

February 9, 2021, 11:39 AM	#21
Mike Irwin Staff Join Date: April 13, 2000 Location: Northern Virginia Posts: 41,390	The Eley/Webley round had a rim thickness of .039, while the .45 Colt had a rim thickness of .060. Additionally, the width of the .45 Colt round as was slightly greater, so some counterboring would generally have been necessary unless it was a sloppy fit to begin with. What's interesting is that the picture of the chambers appear to show the original chamber shoulder as a very faint line just before the current shoulder. My guess is that your revolver did originally have shoulder chambers and wasn't bored straight through. __________________ "The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza Baby Jesus cries when the fat redneck doesn't have military-grade firepower.