When people talk of a 38, they mean .38 caliber, or 38/100th of an inch. Likewise, a 45 is .45 caliber or 45/100th of an inch. 45 > 38 so a 45 has a larger diameter. However, there are different lengths for each of those calibers, so a .38 Special is longer than a .45 ACP so in THAT sense, a 38 is larger (longer) than a 45.
No! What's the matter with you?
the are also chambered for the 38 caliber, 9mm caliber and 22 caliber
Caliber is the diameter of the bore of a firearm. It's expressed in hundredths or thousandths of an inch, as in .45 caliber or .380 caliber. Curiously, the actual diameter of a .38 caliber slug is 0.357 inch.
Either platform can be larger than the other. The 45 has the larger projectile. Caliber is defined as the diameter in fractions of an inch, so .40 caliber is smaller in diameter than .45 caliber. Caliber can also be defined in the metric system, measured in milimeters. The .40 caliber cartridge is equivalent to 10mm in diameter. As noted, the size of a handgun can vary widely within one caliber, so it is perfectly reasonable to have a smaller handgun crafted in a larger caliber.
45 has the larger projectile. Size of the handgun will vary.
38 caliber diameter is about .357/.358 whereas the 45 cal diameter is about .452
Caliber is .45 GAP (Glock auto pistol)
The .45 caliber is bigger in diameter. If you mean weight. The .45 caliber is generally heavier. However there are some lightweight .45 caliber bullets that are lighter than .357 caliber bullets. Generally speaking .45 caliber bullets weigh between 180 - 230 grains. While .357 caliber bullets generally weigh between 158 - 180 grains. If you are talking about diameter, the .357 caliber bullets are approximately 0.357 inches in diameter. The .45 caliber is approximately 0.450 inches in diameter. Again, using this measure, the .45 caliber is the larger bullet.
The 22 is a very small bullet and the 38 is about 4 times larger. The pistols however may be about the same size but will be chambered accordingly.
1942-45. Probably 38 special
No such caliber, and no public SN records