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Bad Brass? Please help.

 
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  #8  
Old 07-31-2007, 11:54 PM
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Join Date: Jul 2001
Location: San Antonio, Texas
Posts: 244
400,

I've experienced the same thing in my 270x300RUM.
I would definitely say that it is directly related to high pressure.

Personaly, I've not loaded for the 300, but I would choose a powder with a slower burn rate than 7828.

Something more along the lines of Hodgdon Retumbo, H50BMG, US869, AA8700, or some surplus WC872.

Just a thought.


As for the marks, they are from the ejector pin hole. As the brass deforms under high pressure it flows back into the hole just slightly. When you open the bolt, it shears off what ever brass has flowed into the hole. Hence the shiny circle.
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  #9  
Old 08-01-2007, 12:11 AM
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Join Date: Jul 2004
Location: Texas
Posts: 5,384
Bad brass

Bullelk

That is a tough load and if your getting extractor marks(the round extractor
plunger leaves a round brite place on the brass it is very hot and as the
rifle warms up it get's worse.

I recomend backing off like the others said.

This time of the year all load's are hotter to some degree so be very careful.

J E CUSTOM
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