Pressure signs - extractor shine

[243winxb]

308 Win. High Pressure - Prvi Partizan (same as wolf Gold) brass

There was a thread on here using prvi in a 308. Starting loads gave high pressure with primers falling out. Here it is> http://www.thehighroad.org/showthread.php?t=501655

 

[Clark]

I don't worry about the absolute value of pressure.
I worry about the bad effects of pressure like short brass life or short gun life.

So with 7x57mm rimmed Norma brass I have load with very low pressure to get the brass to live long and prosper.

Prvi Partizan 308 brass might also be soft as butter.

 

[pseudonymity]

I have probably 80-100 pieces of that same PPU brass in .308, and I see that slight shine around the ejector also on some of my rounds. In my case, I am pretty sure that it is from the factory load, not my reloads. My typical load is 43.1g of 4064 under 175g bullet @ 2.8 OAL. That load is well within published load data.

The one thing that I did notice with the PPU brass is that the actual thickness of the rim is significantly larger than other brands of brass. I actually had to buy another shell holder for my hand primer because I had to pull the priming tool apart about 10% of the time to remove a PPU case. The shell holder was obviously on the low side for rim thickness of course, but no other brand of brass would stick in the shell holder like that. Maybe that rim thickness has something to do with that ejector mark? Are the rims on your PPU brass thicker than other brands of brass?

 

[Comrade Mike]

COAL to hit the rifling = 2.860". COAL I'm using = 2.820". Would it lower pressure to shorten to 2.800"?

No! Shorter OAL = lower case volume = higher pressure

Load it longer to reduce pressure but don't stick it in the lands

 

[BullfrogKen]

The earlier picture you showed - no problem. I wouldn't care about ejector marks like that.

The second - maybe a bit concerned. I'd want to chrony the rounds first, though. I have a Winchester M-70 that has a rough spot on the ejector. It would do that with factory loads, and intentionally light loads - so light the brass hadn't sealed and let soot flow back along the case. I once took a file to it to try and smooth it out, and never could find it. My chrony was telling me the truth so I stopped worrying.

 

[Bruno2]

to get the brass to live long and prosper.

I like this!