I have a 940 in 9mm Parabellum. On range day, I took out a box of Win White Box, 115 9mm Luger. After the first five rounds, the second five would not eject without beating on the rod. I talked to a couple of people on this forum and the result was the use of "hones" in the cylinder to correct the problem. I honed them and now the Win stills sticks, Fed only slightly, PMC slightly, and Remington, hardly at all.(takes 4 full cylinders before it sticks) I have done a little reading and found 9mmm Parabellum, but in lighter bullet weight and lesser power numbers. Could this be the reason the higher pressure 9mm Luger is causing the rounds to expand too much to release? I am going to go find some parabellum, but I got to say, this whole thing is getting very frustating! Any help out there? Thanks.

I have a 940 in 9mm Parabellum. On range day, I took out a box of Win White Box, 115 9mm Luger. After the first five rounds, the second five would not eject without beating on the rod. I talked to a couple of people on this forum and the result was the use of "hones" in the cylinder to correct the problem. I honed them and now the Win stills sticks, Fed only slightly, PMC slightly, and Remington, hardly at all.(takes 4 full cylinders before it sticks) I have done a little reading and found 9mmm Parabellum, but in lighter bullet weight and lesser power numbers. Could this be the reason the higher pressure 9mm Luger is causing the rounds to expand too much to release? I am going to go find some parabellum, but I got to say, this whole thing is getting very frustating! Any help out there? Thanks.

9mm Luger and 9mm Parabellum are the same cartridge, different names. Luger was the inventor, parabellum means "for war."

Different companies load them differently. If the gun tells you which it likes, then there's the answer.

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Science plus Art

The 940 Smith is known for sticky extraction. S&W warns about it. Use ammo that is least prone to stick. 9mm Luger=9mm parabellum=9x19mm.

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I shoot, therefore I am.

They are right, the 9mm Luger = 9mm Parabellum = 9X19mm. Just different names for the same round just like the 9mm Short = 9mm Kurtz = 9X17mm = .380 Auto = .380 ACP.

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Freedom is never free!!
SWCA #3437

I haven't had any problems with sticking cases in my model 940, but nickel plated cases are less likely to stick in some revolvers than unplated cases. At least that has been my experience.

The 9x19 Parabellum round was/is commonly called the 9mm Luger because:
A. The P-08 Luger was the first pistol chambered for this round.
B. The P-08 Luger pistols brought back by WWI vets were the most common guns chambered for this round in the US.

Al the dimensions I have mic'ed bear out the fact that they are the same. I guess I have been reaching for something that down deep I knew wasn't there. I got a box of Federal 9mm in 95 grain JSP. Anybody know anything about this ammo? Thanks you guys for your help.

As has been stated. Simply different names for the same cartridge. The sticky extraction is a known issue with the 940. I also think it was one of the reasons it was discontinued, although I have no authoritave knowledge for this conclusion.

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Formerly know as Lucky Derby

There are two ways to look at the 9mm Federal. From a bullet/pressure standpoint it is a 9mm Parabellum Rimmed. From an even more basic standpoint it is nothing more than the .38 S&W with a .355 bullet loaded to higher velocity.

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Gunsmithing since 1961

I have always preferred the 9mm Luger over the 9mm Para. Just a personal choice.

You didn't mention any European manufacturers but just FYI. They tend to load their 9mm parabellum a bit hotter on the other side of the pond. Is the ammo you are using all commercial? Some military 9mm ammo is loaded for machine pistols with hard primers and a hotter load to ensure operation.

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Big bang, much smash'em.

I believe the cartridge you're referring to was the .380 MkII. I first noticed this in Norma Ammunition. The round was discontinued when it was pointed out that it would chamber in .38 S&W pistols, some of which were barely safe with .38 S&W pressures, much less 9mm.