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My friend gave me 20 re-load rounds of ammo.The cases stated 9mm on the shellplate and not 380.I called him and asked if he had trimmed 9mm luger cases? He said no that they were 9mm shorts.They are the exact same shells as my 380 ACP shells in terms of dimensions. They fit and shoot fine.
Are 380 acp shells and 9mm shorts the same shells? That is my question.I do know that there are two different types of 9mm shells. I suppose that if they are stamped 9mm they are correct and if stamped 9mm luger they are wrong for my p3at and about 1/4" too long.----------Someone in the know I hope responds to this inquiry.---Johnny
 

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Yep, 9 mm short and .380 ACP /.380 Auto are the same.
The 9mm Luger/9mm Parabellum is not the same as the .380 ( in more than just length) ;)

Introduced by the Belgium firm FN in 1912, the 9mm Browning short is one of several pistol cartridge designed by John Browning. In some European countries, this cartridge has also been designated as the 9mm Kurz and 9mm Corto, but in the United Sates it goes by the name of .380 Automatic or .380 ACP (Automatic Colt Pistol)
http://www.reloadbench.com/cartridges/p380acp.html
 

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johnmiltonmiller said:
... I do know that there are two different types of 9mm shells...---Johnny

there are more than 2 types of 9mm, i can think of a few off the top of my head... 9x17 (.380), 9x18 makarov, 9x19 luger(aka. parabellum, NATO, couple of other synonyms), 9x21, then there's the fact that .38 special and .357 are also 9mm in diameter, as well as their friends the .357 sig and .357 max.

this link may be of some help to you.
 

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p3atnewb said:
[quote author=johnmiltonmiller link=1244615377/0#0 date=1244615376]  ... I do know that there are two different types of 9mm shells...---Johnny

there are more than 2 types of 9mm, i can think of a few off the top of my head...  9x17 (.380), 9x18 makarov, 9x19 luger(aka. parabellum, NATO, couple of other synonyms), 9x21, then there's the fact that .38 special and .357 are also 9mm in diameter, as well as their friends the .357 sig and .357 max.

this link may be of some help to you.  [/quote]
Actually, 38 Specials, .357 Magnums, and .357 Maximum are .357-.358 whereas 9mm are .355-.356. One cannot safely use 38 caliber bullets in any 9mm Luger or .380 ACP firearm. Doing so will cause premature wear of the bore in the barrel and cause extreme spikes in SAAMI pressures. Only the 357 Sig is a 9mm or .355-.356 bullet. The 357 Sig is a necked down 40S&W case from .401 to .355.
 

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People have noted in the past that for example the Walther PPK/S model manufactured in Germany will be marked 9mm Kurz (tranlating to 9mm short) and the same weapon manufactured in the US is marked .380 ACP. I knew of a person once who owned one of each and was surprised to realize they were actually the same gun (albiet the German worth quite a bit more).
 

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billjohnso20 said:
One cannot safely use 38 caliber bullets in any 9mm Luger or .380 ACP firearm. Doing so will cause premature wear of the bore in the barrel and cause extreme spikes in SAAMI pressures.
Sure you can.
A .001" or .002" oversize bullet will not cause any harm if you work up the load for them.

The proper lead bullet dia for a 9mm/.380 is .356".
A .357" lead bullet, if it will chamber, will not increase pressure or wear out the barrel.

BTW: I'd bet money if you slug a P3AT barrel and measure it, it will be closer to .357" then .355" anyway.

Other names for the .380 ACP:
.380 Auto
9mm Browning
9mm Corto
9mm Court
9mm Kratak
9mm Kurz
9mm Scurt
9mm Short
9x17mm

Other names for the 9 mm Parabellum:
9mm Luger
9mm NATO
9x19mm
9x19 mm
9x19mm NATO
9 mm Para
9mm
Nine (I'se gonna cap yo azz wid my Nine)

rc
 

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rcmodel said:
[quote author=billjohnso20 link=1244615377/0#4 date=1244652412]One cannot safely use 38 caliber bullets in any 9mm Luger or .380 ACP firearm. Doing so will cause premature wear of the bore in the barrel and cause extreme spikes in SAAMI pressures.
Sure you can.
A .001" or .002" oversize bullet will not cause any harm if you work up the load for them.

The proper lead bullet dia for a 9mm/.380 is .356".
A .357" lead bullet, if it will chamber, will not increase pressure or wear out the barrel.

BTW: I'd bet money if you slug a P3AT barrel and measure it, it will be closer to .357" then .355" anyway.

Other names for the .380 ACP:
.380 Auto
9mm Browning
9mm Corto
9mm Court
9mm Kratak
9mm Kurz
9mm Scurt
9mm Short
9x17mm

rc
[/quote]
I'll take your word for it, RC. Everything I've read and been told by the mentors who got me into reloading have stressed never use jacketed 38 caliber bullets in a 9mm application. I've never checked on lead bullets though like you mentioned.
 
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