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Old February 12, 2013, 02:57 PM   #9
Magnum Wheel Man
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Join Date: July 26, 2006
Location: Southern Minnesota
Posts: 8,552
did a little searching & came across this... ( which does show the Federal SR primers with the thinnest of primer cup material )... also shows the Winchesters as having thinner cups... so I could probably move those two boxes over to the pistol primer section of the shelf...

http://www.jamescalhoon.com/primers_and_pressure.php
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