The S&W model 1917 is a great platform for a project revolver. I favor the .44 Special and this is my current project. It was an old gutted .455 that I got from a parts dealer at a local gun show. It was a conversion from .455 to .45acp when I got it. Amazing that the barrel, cylinder, and side plate were still together. The cylinder had been modified to accept the moon clips for the .45acp and the barrel shortened to 4" (see barrel with blue tape in photo). You might want to consider the .44 caliber for your project. Enjoy your labor of love!!!