The .357 part of the name means that the bullet diameter .357 inches. I do not know what the "Magnum" means in the name.
As far as diameter, there is very little difference. A .357 is .358 in diameter and a 9mm is .356 in diameter.
Both terms describe the diameter of the bullet in decimal parts of an inch. For example, a .357 bullet is 357 thousands of an inch in diameter and the .45 bullet is 45 hundredths of an inch in diameter. These labels of bullets are most common in the United States. Much of the world refers to bullet sizes in metric terms, i.e. 9mm means a bullet that is 9 millimeters in diameter.
The actual bullet diameter (as well as that of the .38 Special) is .357.
No. It is a fatter diameter than .357, and will not fit. The bullet diameter is .361, instead of .357.
The .357 has a longer case and a heavier bullet; it is identical to a .38 in diameter but far more powerful. This is why a .38 will fire in a .357 but not the other way around.
357- as in .357 magnum, is the diameter of the bullets fired in fractions of an inch. It uses a bullet that is 0.357 inches wide.
Case length, case capacity, bullet diameter
Close. a .38 caliber is usually closer to .357 caliber.
If by 38 you mean the 38 special , the answer is yes , as both use a .357 dia bullet
In a pure sense, it is a measure of the diameter of a bullet, usually given in decimal fractions of an inch (a .357 bullet is about.357 inches thick) In a broader sense, it is the cartridge that a given weapon will fire- such as caliber .38 Special, or caliber 30-06.
Bullet diameter on a 38 is .357; on a 380 it is .355 Case is longer on a 38.