In my trusty Winchester reloading pamphlet, 5.7 grains of 231 is the max charge. In my Speer reloading book, 6.2 is max for 231. My personal favorite is 5.2 grains of 231. Those loads are based on a 230 grain FMJ bullet. In the Speer reloading book 13th edition starting on page 50, there is discussion of primers and their appearance after firing. Let us know what you learn!
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Steve
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Steve
