Predicted Effect of Switching Brass


Well-Known Member
Jan 6, 2005
Should I expect a significant difference (velocity or accuracy) when I switch from R-P to Winchester brass for my .264 WinMag?
In a word----MAYBE.... Depends on the rifle but if you are anywhere a max load then back down a bit --- not to mention that you have issues when you use WW brass (for example) but a different lot number.
It will by my "guess" that the win brass will have slightly more capacity and your loads will actually slow down a tad. If you have both brass on hand trim a fired case of ea and fill them with a fine powdered gun powder to the case mouth and see which one holds more. If they are close in wt they will most likely perform the same.
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