What is the design bullet weight for 9mm

[Caneman]

looking at reloading for 9mm... what bullet weight was the cartridge designed for?

[JLA]

115 RN is what the germans developed it with for use in the P-08 luger.

But it is suited to bullets weighing 90 to 147 grains.

I have some SD loads with 90 gr XTPs that run 1450 fps from my CZ 75. And it isnt a +P load either.

Most modern military and police model 9mm pistols are geared around 124 gr FMJ, all other commercial models should be geared toward 115 gr FMJ.

[Boris]

This is a common mis conception. The original 1902 spec ammo was a truncated 124.

http://cartridgecollectors.org/intro...tro9mmpara.pdf

[JLA]

Excellent read Boris. I read somewhere thet the original design was a 124 gr lead bullet but it wouldnt feed in the German Luger and was changed to the 115 FMJ before official production began, but i dont remember where i read it..

That is well documented information.

[Caneman]

thanks gents

[Boris]

Originally Posted by JLA

Excellent read Boris. I read somewhere thet the original design was a 124 gr lead bullet but it wouldnt feed in the German Luger and was changed to the 115 FMJ before official production began, but i dont remember where i read it..

That is well documented information.

Back in the days before the inter web I read a complete history of the 9mm. That book is 784 miles from me right now so I had to hunt that down lol.

Good ole George never intended anything but a jacketed bullet to go down the bore of his pistol he designed.

Even more impressive is the original spec for velocity. It was speced out to just a tad over 400ms. Some serious speed. That's why CIP spec 9mm blows the pants off SAAMIs way under powered spec.....

[JLA]

And is why the 25ACP in europe is generally considered a viable SD round, and over here is considered less powerful than a .22LR

[Boris]

Originally Posted by JLA

And is why the 25ACP in europe is generally considered a viable SD round, and over here is considered less powerful than a .22LR

Don't forget the 7.65Br. My CIP loading manual has the max CIP pressure 5,000psi higher than SAAMI. Most starting loads are higher than the SAAMI max loads.

Same goes for 9x19mm CIP load data. Most loads for CIP start above where SAAMI loads it's max loads. I have a load in my CIP manual that gets 1207fps with a 147 grain XTP, from a four inch barrel..... That's like 35fps slower than 357SIG loads in that weight.

SAAMI specs for a lot of calibers is below substandard. 9mm, 25ACP, 7.65Br. Even CIP 40S&W has a higher max psi. Their 10mm data shames SAAMI 10mm specs.

If you all can, get yourself a CIP loading manual, do the conversions and hold onto your jaws if all you ever loaded was SAAMI spec ammo......