http://www.sff.net/people/sanders/ammo.jpg
First 2 in this comparison pic are the 357 Magnum and the 38 Special. Roughly 1/8” longer case on the 357 but much larger powder charge is normally loaded.
Here is a very good article comparing many hand gun cartridges. The number that will accept the same diameter bullet is amazing.
“CALIBERS AND CARTRIDGES”
http://www.sff.net/people/sanders/rrdws3.html
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Most of those who shoot do not know how many bullets can be substituted in a pinch. I have a 170 grain bullet mold that I bought to cast bullets for my Winchester 94 30/30, but the same bullet can be loaded in both 308 and 30-06 cartridges. It works fine.
In the even it is hard to get factory bullets, cast pistol and rifle bullets are a good substitute. Expecially on the pistols, because of the slower muzzle velocity.
I wonder if black powder can be substiuted as a propellent in case ammo "in an emergency"?
