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dmazur · February 28, 2012, 01:56 AM

Polished brass does result in easier extraction.

So does a polished chamber. If you do both, you can reduce case stretch, somewhat. (See Varmint Al's FEA...)

However, clean brass is easier on your dies, as it gets rid of the grit which is typically sand (quartz). Probably also easier on your chamber.

I'm not sure you have to polish the brass to get this last benefit...I do it anyway, for the reason already mentioned - makes it easier to find.

February 28, 2012, 01:56 AM	#10
dmazur Senior Member Join Date: July 5, 2007 Location: Pacific NW Posts: 1,310	Polished brass does result in easier extraction. So does a polished chamber. If you do both, you can reduce case stretch, somewhat. (See Varmint Al's FEA...) However, clean brass is easier on your dies, as it gets rid of the grit which is typically sand (quartz). Probably also easier on your chamber. I'm not sure you have to polish the brass to get this last benefit...I do it anyway, for the reason already mentioned - makes it easier to find. __________________ .30-06 Springfield: 100 yrs + and still going strong