Excessive pressure at the primer ????

[The Bolt Action]

Hi Cgn Members.

I shoot my first ever reloads this week end and i notice a little problem.

First, the caliber i reload was 8mm Mauser. I take surplus round i already have and pull out the Bullet. I transfer the powder of the surplus round too a new brass case and primers and press in the surplus bullet.
I think it's a good way too get started in reloading with already proven powder charge and bullet combo. This way i can get more confortable with primer seeting, case resizing, case trimming and crimping without have too think about power charge and burn rate and everything.

Here is the problem, i press the primers about 0.004" to 0.006" deep and after fireing i mesure again and the primers are dead flush with the rim 0.000"
Do i have a problem with pressure ??? and can this be dangerous ???

I use cci 200 primers and Winchester brass.
Thanks Oliver

 

[cosmic]

No problem.... Here's an idea - use some better bullets with the existing cases and powder - its called "Mexican match". You can sell the pulled bullets here... Makes your reloading efforts worthwhile.

 

[ben hunchak]

Why don't you just shoot off the existing ammo? Do you know for sure that the new cases have the same capacity as the surplus? If you have new cases(civilian), why not use new components? Even if you do what you say, you're not proving anything...you're not developing an accurate load, one you can replicate with say, soft points for hunting?

 

[glang1]

Hi Cgn Members.

Here is the problem, i press the primers about 0.004" to 0.006" deep and after fireing i mesure again and the primers are dead flush with the rim 0.000"
Do i have a problem with pressure ??? and can this be dangerous ???

The pressure from firing the round presses the primer flush against the boltface. This is normal. Since you were using the same bullet/powder combination, it is highly unlikely that you would have an over-pressure situation. Make sure you seat the bullets the same as the parent cartridge, as this will affect pressure.

George

 

[The Bolt Action]

I am happy to know that this situation is not dangerous.
I am not shooting the surplus ammo as it is anymore because i have many problem with split case after fireing and stiff primers. they are 50's dated rounds and seems not reliable at all. I am not trying too prove anything and not trying too built the most accurate load ever, i just want to explore the reloading world one step at the time.

 

[deagle2008]

op your just doing fine. i do the same with my 1950s surplus the cases and the primers are not reliable. ive got very good results by doing that. i use cci lr primers and win/rem cases . hell i even use my 30.06 convert to 8mm cases too

 

[Baribal]

Not rare with W-W brass, and this happens especially with their low pressure commercial (same for Remies). If you compare them (using datum circle) to the other bunch you have, you'll likely find the W-W are smaller, closer to the minimal SAAMI dimensions and when you combine short cases with low pressure, you end up having a pop'd out primer. The powder may be oxydized a bit and the primers you use may not be up to the power of military ones.
The W-W cases may also have a larger internal capacity than the original ones too, hence a lower pressure. You can compare the internal volume by weighting the cases empty, then full of water.

 

[Ganderite]

Nothing unusual about a flush primer.

If it sticks out a bit, that is a sign of low pressure.

You should see the rounded edge of the primer in the pocket. When this rounded edge gets flattened out, then you are seeing pressure.