The difference should be 1mm. 1cm=10mm
I concur
1 cm is equivalent to 10 mm. So, the size difference between 1 cm and 9 mm is 1 mm.
Glock is a brand. 9mm is a caliber size. So, there is no difference between a 9mm glock and a 9mm of another brand as far as caliber size.
The .22 bullet is smaller than the 9mm in size, (about 6mm) and is lighter in weight.
No such ammuntion as 9mm rugger
9mm= .355 45 ACP = .452
9mm = .355 40 cal = .40
Same round, different weapon design.
Case length.
As far as diameter, there is very little difference. A .357 is .358 in diameter and a 9mm is .356 in diameter.
Different makers. The cartridge used is the 9x19.
There is no difference- Luger is a name that is commonly used in America and Parabelum is used in Europe, they are both 9x19.
The 9mm Parabellum is longer than the .380 ACP (also called the 9mm Short) They do not interchange.
9MM Luger can be Ball ammunition. Ball just means it is a jacketed round nose bellet.