It's difficult to answer. As far as I know, every American gun manufacturer makes numerous models in .40 and almost every other manufacturer does also.
Only Colt knows and they aren't about to divulge that information.
The correct term is cartridge, not bullet- and the answer will depend on WHICH .40 caliber pistol.
The .40 caliber fires a larger, more powerful cartridge than the 9mm. which is about .35 caliber. Minor additional info: Many models of pistols that are available in 9mm or .40 are otherwise the same, except for caliber. For instance, a Glock 19 and a Glock 23 are the same exact guns, but the 19 is a 9mm and the 23 is a 40...the 23 holds 2 less rounds.
The most common in the U.S. I believe is the Glock 23, but Sigs, and other models are common also.
No
the 40 cal is a little bigger then the 357
40
40
"My pistol is .40 caliber." "We were fortunate to find a manager of his caliber."
Yes, a 45 caliber bullet is bigger than a 40 caliber bullet. A .45 is0.45 inches wide in diameter and a .40 is 0.4 inches in diameter.
@ .05 inches
The model 19 is a 9mm only proposition. The model 19 is not available in .40 caliber, but the model 23 is the same size gun and it is a .40 caliber gun. Some people would say that the model 23 is the .40 caliber version of the model 19.