High Lord Gomer Posted May 24, 2009 Share Posted May 24, 2009 I loaded some 180gr MG-CMJ for minor to shoot in Production and shot 5 of each through the chrono today. They were within 2 fps of each other and had a SD of 8 and 9, respectively. 4.5gr of WST loaded at 1.133 through an M&P40. Link to comment Share on other sites More sharing options...
technetium-99m Posted May 25, 2009 Share Posted May 25, 2009 My SD actually dropped by going to a magnum primer in my 45 loads. They cost the same and I save .2 gr of powder per round. I like them. Link to comment Share on other sites More sharing options...
yoshidaex Posted May 25, 2009 Share Posted May 25, 2009 same or mixed head stamp brass? when doing tests of these sorts, best to use the same head stamp to get rid of as much variables as possible. case volume between different head stamp brass varies. though i'm not sure how much they will affect the results. Link to comment Share on other sites More sharing options...
High Lord Gomer Posted May 25, 2009 Author Share Posted May 25, 2009 Good point...it was mixed range brass of unknown history. Link to comment Share on other sites More sharing options...
Sean Gaines Posted May 25, 2009 Share Posted May 25, 2009 Sidnal on this forum lost speed, switching to a magnum primer, shooting 9 major, go figure. When he told me that, I couldn't understand. Link to comment Share on other sites More sharing options...
technetium-99m Posted May 25, 2009 Share Posted May 25, 2009 Mine was all Federal headstamp. Like I said, I like em. Link to comment Share on other sites More sharing options...
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