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**Mike Irwin** · October 2, 2012, 06:56 AM

Somewhere on your gun it might be stamped Cogswell & Harrison or Parker Hale.

These companies "converted" a lot of old British lend lease revolvers to .38 Special simply by reaming out the chambers.

As others have noted, the .38 S&W uses a shorter, fatter case with a slightly larger bullet, so results are not always optimal. You can have cases swell or even split.

Generally most people say these are OK with standard velocity, non jacketed .38 Special loads, but NO NO NO +P ammunition.

Personally, I won't even fire such a conversion.

October 2, 2012, 06:56 AM	#5
Mike Irwin Staff Join Date: April 13, 2000 Location: Northern Virginia Posts: 41,390	Somewhere on your gun it might be stamped Cogswell & Harrison or Parker Hale. These companies "converted" a lot of old British lend lease revolvers to .38 Special simply by reaming out the chambers. As others have noted, the .38 S&W uses a shorter, fatter case with a slightly larger bullet, so results are not always optimal. You can have cases swell or even split. Generally most people say these are OK with standard velocity, non jacketed .38 Special loads, but NO NO NO +P ammunition. Personally, I won't even fire such a conversion. __________________ "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.