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Old September 14, 2012, 08:17 PM   #5
Senior Member
Join Date: November 8, 2007
Posts: 2,001
Strangely, the Alliant data for the new 300-MP powder uses CCI primers for all cartridges except the .357 magnum, where it uses Federal 100 primers.

Has anybody loaded 300-MP to the max of this data with the Federal primers?

Did they survive?

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