One thing I've always wondered about the S&W Model 1917 model and its later commercial and Brazilian contract variations - and I guess this holds true for Colt Model 1917's too - is why was the gun was made with so much excess length in the chambers beyond what is neccesary to fit a 45 ACP cartridge in? If you notice a loaded cylinder, you'll see that the bullet sets pretty far back in the chamber - almost like a 38 special round in a 357. I can understand why the 38 round sets way back in a 357, the 357 was built to shoot a 357 cartridge, but the Smith Model 1917 was originally built to shoot 45 ACP wasn't it? or was it .455? I'm not really complaining. This could be a really great feature.
If you'll click on the hyperlink on post #62 above on this thread and scroll down through that website until you come to the place where there are about 5 or 6 different links shown all together, if you click on the last link of that group it'll take you to an article about how to make homebrew shotshells for a Model 1917 out of 30-06 brass. it's very interesting, but the main thing I noticed was how long that shotshell was compared to a standard 45 ACP or 45 Auto Rim cartridge. Thats how much excess space is in a model 1917 chamber. All that excess room is great for a shotshell.There's enough room in the cylinder to load lots more pellets in those homebrew 45 shotshells than are in commercial 38 shotshells, and at 5 feet the homebrew shell has a 6 inch x 6 1/2 inch pattern which would be absolutely perfect for snakes. At 8 feet distance the pattern is 16 inches x 16 1/2 inches which still isn't too bad. But I don't do resizing 30-06 cases, so I sure wish somebody would make these things commercially. A good commercial shotshell (say in 45 Auto Rim) for a 45 revolver is all that's missing from the ammo lineup to make a 45 revolver the absolute best all-aound yard work, land clearing, fishing and hunting, outback, brush country, floor of the truck, mountain type handgun made. But without a shotshell, there's still a big, big ammo lack before a 45 revolver can be all those things. Thats why mine is relegated to nightstand duty waiting for the hapless intruder to pick the wrong house to invade, while my Police Positive Special 38 Special that I can buy shotshells for makes all the outdoor trips. Are you reading this Black Hills?