Quote from: Graybeard on December 26 2022 07:32:28 AM MST
Since I am unfamiliar with the powder you are using I can only suggest that full ignition wasn't happening, resulting in the lower velocities.

I spoke to DEVA today about the measurements. They told me some possible reasons for the problems:

• no full ignition
• damaged cases
• to small diameter of bullet
• some oil in the test barrel (first shot)

They told me if the bullet is to loose in the case it moves before it should move and the result may be uncomplete ignition.

In a german forum people say that they needed magnum primers for P806 and that they have more power with magnum primers and a reduced load. Is it possible that there is a problem with the Fiocchi LP primers?

I will try again with P806 and Hodgdon Longshot and I will check the diameters and I will make a sufficient crimp with the LEE Factory Crimp Die.

DEVA (https://www.deva-institut.de/) is a registered association. They are measuring velocity and pressure every day. It is not likely that they made a mistake.

So I have to search for the mistake at my rounds.

I have two ideas:

• The overfill of 117% (Xtreme Penetrator) or 107% (XTP) is not good
• The length of the rounds had been changed during the shipping

Quote from: The_Shadow on December 25 2022 03:08:34 PM MST
Looks to be inconsistent looking at the numbers, Recoil spring or system might be suspect or the actual bullet to case fit tension.

To avoid any misunderstanding.

The two documents are from an institute which is investigating the rounds with a test barrel to see if there are safe or not.
It is not likely that they did a mistake (but I can ask them if it is possible).

I can make some pictures from the powder when I am back at home.

Does anyone have an idea why my rounds with Rottweil P 806 are so bad?

Please look at these images:

Hornady XTP


Xtreme Penetrator


The rounds has been fabricated very precisely. My scale can weigh 0.1 mg = 0.0015 grain.
All rounds are equal.

Why are the results so different?

Is it possible that it is a consequence of overloading ?
The problem was that the P 806 had 20 % more volume than advertised in QuickLoad software.
So I put more powder into the cases as planned.

Thank you and Merry Christmas to all of you!

It seems that Lovex D037.1 and Hodgdon Longshot have the same burn rate.

I will try one of them!

Thanks

Juergen

Exactly. The barrel is from IGB Austria.

To be a little more precise and more detailed:

The gun is a Glock 41 Gen 4 MOS caliber .45 auto (5.3"). The conversion barrel is a 10mm Auto (6") from IGB Austria.

If you have a hunting licence in Germany it is only allowed to have two handguns. But you may have some conversion barrels for each handgun on condition that the conversion barrels have a smaller caliber than the original barrel. That is the reason why I have a Glock 41 with a 10 mm Auto barrel.

I want to use the 10 mm Auto for killing wounded animals and for self protection. We have no polar bears and grizzlies in Germany but big boars.

The bullets I want to use are

• Hornady XTP 180 gr #40040 and
• Lehigh Defense Xtreme Penetrator 140 gr

My cases are from Starline, primers are Fiocchi LP.

I tried the powder Rottweil P 806 but the result was poor.
There are two big problems: the spreading of velocity and pressure is to big and the load of the powder is to high.

I am looking for a powder with maximum bullet speed at 2300 bar = 33,358 psi.
The attached list https://www.pulver-mueller.de/upload/download/katalog/Bestellliste_leer.pdf shows the available powders.

I know that in german forums people use Vihtavuori N350,  N105, 3N37, Hodgdon Longshot, Reload Swiss RS20, RS24, Lovex D037.2.

But I don't know which are the best powders for the two bullets above.

Perhaps you can help me. Thank you very much for any help !

Juergen

Hello !

I am living in Germany and I can only buy the powder you can see in that list:
https://www.pulver-mueller.de/upload/download/katalog/Bestellliste_leer.pdf.

I tried Rottweil P 806 but the result has been poor with the bullets mentioned in the subject.

Important for me is that the maximum pressure is 2300 bar = 33358 psi because C.I.P. allows only 2300 bar. And C.I.P. is mandatory in Germany.

The gun is a Glock 41 with a 6 inch barrel 10 mm Auto.

Thank you for any help !

Juergen