.38 caliber revolver
the 12 guage is a caliber not a gun
Colt SAA. Probably in 45LC
The caliber of a firearm refers to the bore diameter of the barrel,and what caliber is marked near the chamber of the gun,or on the barrel.
Need a detailed description of all markings and dimensions
a .45 caliber.
What caliber of man are you looking for? What caliber of gun are you looking for?
It is the standard .68 caliber
Caliber has nothing to do with it.
smaller the number, the smaller the caliber.
The short answer is no. The longer answer is, you might be able to get a .40 caliber cartridge to fire from a .45 caliber gun, but it may damage the gun, and even if it doesn't damage the gun, it will cause other problems. In general (with only a few exceptions) you should never try to fire any cartridge in any gun other than a gun designed for that caliber.