9 and 10 mm.?

[pianoman9701]

9mm = .354 cal
10mm= .394 cal

not sure about any interchangability, but those are the conversions.

[huntinguy]

The conversion factor is 1mm = 0.0393700787 in

Interesting, I always thought a 9mm was .380 cal.

380
Bullet diameter
 
.355 in (9.0 mm)

I always thought the .380 was a 9mm Short (9mm kurz).

Wonder if you could call the 40 S&W a 10mm Short? 

[TONTO]

 The .380 is 9mm (.355), .38 is .357..........go figure

[Button Nubbs]

Huntinguy,

We don't need to call it 10mm short. Its already called the .40 Short and Weak.

[marlin]

10mm is king! I have all 3.. a .380 that stays in my pocket just as much as my wallet, and a 9mm that is used mostly for plinking, and a g20 10mm that puts a smile on my face every time I pull the trigger! I dont understand why 10mm isnt so popular and .40 short and weak is.. You can load 10 down to .40 power but why? I like the sting in my hand and the BOOM. Get a 10mm, and some doubletap 200gr and go put a smile on your face. I let my buddy shoot my G20 and I think he is going to dump his .45 and get a 10