Quote:
Originally Posted by jmiles1960
Thanks to everyone for the info. If I stumble across a 1917 cylinder, I may give it a try.
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As ctg4570 posted, with the .45 ACP cyl you'll get a lot of fore and aft slop with cyl open. You can punch out the frame lug in the lower right corner of the cyl window from inside the frame and replace it. Or punch it part way out, turn it 180 degrees, push back in and fit it to the new cyl.
Any pre WWII model Smith chambered for 45 Colt used the same barrel dimensions as the .455 specified as; bore (land) diameter - .447" to .448"; groove diameter - .457” to .458" until the 1950s.
And they didn't ship any that didn't shoot well I've ever heard about in all my years. As you'd expect, .454" bullets work the best.
In the 50's .45 Colt barrels became the same as .45 ACP barrels which were specified as; bore (land) - .445"; groove - .451” from the get go in 1917.