Which is better- Spaghetti or Pizza? The .40 cal has more energy, and appears to be a higher "stopping power" round than the 9mm Parabellum. The 9mm has less recoil, and the ammunition is (generally) less expensive. You will find folks that can argue BOTH sides of this questions.
EDIT*
The .40 is generally preferred in combat situtations as it is significantly more powerful and is not too much bigger.
9mm = .355 40 cal = .40
No
No, 9mm
The .40 is larger in diameter and (normally) has a heavier bullet.
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.
No. 9mm and .40 are not interchangeable.
No. Only shoot the caliber printed on the barrel.
A .40 caliber bullet typically travels farther than a 9mm bullet due to its higher muzzle velocity and larger size. The .40 caliber bullet has more energy and better ballistic performance, allowing it to maintain its velocity over longer distances compared to a 9mm bullet.
Caliber is in reference to the diameter of the bullet. A .40 (which is what I have) is .40 inches in diameter. A .50 caliber is .50 inches in diameter (half an inch). So a caliber is the inches in diameter. Not including the 9mm which I cannot stand
He got shot with a 9mm semi - automatic pistol
9mm IS the caliber. If you mean what is it equivalent to, it is approximately the same as a .38.
The caliber for one.