Tuning for Reliability

[kurusu]

Originally Posted by John Sabato

Failure to lock open with only one round in the chamber and an empty magazine inserted indicates either a holdopen that has restricted movement (rubbing on the right grip), or that the mainspring force is too heavy.

Sporadic failure to lock open with Winchester ammo is not uncommon. I only had 99% lock open when I used Portuguese military grade ammo.

[Michael Zeleny]

Originally Posted by kurusu

Sporadic failure to lock open with Winchester ammo is not uncommon. I only had 99% lock open when I used Portuguese military grade ammo.

Portugal being the founding member of NATO, the standing consensus of this forum is to eschew such loads. I am tempted to reinstall the standard recoil spring and give it a go.

[kurusu]

Originally Posted by Michael Zeleny

Portugal being the founding member of NATO, the standing consensus of this forum is to eschew such loads. I am tempted to reinstall the standard recoil spring and give it a go.

I agree you should give it a try. It was going to be my next suggestion anyway.

[Sieger]

Originally Posted by kurusu

I agree you should give it a try. It was going to be my next suggestion anyway.

Hi,

I don't know what the Europeans are loading as NATO Spec. ammo, but according to our government's official publications on the matter, we are loading a 121 grain bullet to 1,260 fps. (as shot through a pistol)

According to extensive research I have done, in both German commercial and military publications of the period, the original WWII German 9mm Pistol ammo was loaded as follows: 123 grain bullet to 1,076 fps. (as shot through a pistol)

Just do the math. The U.S. NATO Spec. loading is overloaded by approximately 184 fps or 17%. Though this is not a perfect comparison, I think we can all agree that more "energy" is needed to throw approximately the same weight bullet 184 fps faster.

The implied conclusion, from these facts, is that one shouldn't need ammo overloaded by some 17% to get a Luger to function properly (with an original set of springs, in spec., anyway).

Your thoughts?


Sieger

[kurusu]

Originally Posted by Sieger

Hi,

I don't know what the Europeans are loading as NATO Spec. ammo, but according to our government's official publications on the matter, we are loading a 121 grain bullet to 1,260 fps. (as shot through a pistol)

Sieger

I don't know what is being made all over Europe as NATO SPEC 9mm.

Portuguese loads (no longer available since the Government shut down the facilities around 2005) used 115 grain bullet at, if memory serves me right, around 1240 1280 fps.

Originally Posted by Sieger

According to extensive research I have done, in both German commercial and military publications of the period, the original WWII German 9mm Pistol ammo was loaded as follows: 123 grain bullet to 1,076 fps. (as shot through a pistol)

Just do the math. The U.S. NATO Spec. loading is overloaded by approximately 184 fps or 17%. Though this is not a perfect comparison, I think we can all agree that more "energy" is needed to throw approximately the same weight bullet 184 fps faster.

The implied conclusion, from these facts, is that one shouldn't need ammo overloaded by some 17% to get a Luger to function properly (with an original set of springs in good shape, anyway).

Your thoughts?


Sieger

I would not shoot 121 grain bullets at 1260 fps from my P08 either.

[Sieger]

Originally Posted by Michael Zeleny

Portugal being the founding member of NATO, the standing consensus of this forum is to eschew such loads. I am tempted to reinstall the standard recoil spring and give it a go.

Hi,

I had no idea that Portugal was the founder of NATO, as they didn't even participate in WWII.


Sieger

[kurusu]

Originally Posted by Sieger

Hi,

I had no idea that Portugal was the founder of NATO, as they didn't even participate in WWII.


Sieger

Not the founder, but one of the founding members. The expansion of comunism was considered a big threat.

We are getting way off topic.

[Sieger]

Originally Posted by kurusu

Not the founder, but one of the founding members. The expansion of comunism was considered a big threat.

We are getting way off topic.

Hi,

Yes, but I'm not the originator of the comment.


Sieger