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Thanks for posting. What book is that from?
I’ve always read about the duplex and triplex loads, but never saw the data for them.
2 gn Unique, 25 gn 2400, 3 gn Bullseye for the 230gn @ 2000fps.
I can see starting off with a fast burning powder to act as a bigger primer, but I thought it would be followed by a larger charge of a slower than normal powder. Then 3 gn of Bullseye on top of it all? Is that to clean up any unburnt granules of powder?
I wonder how much difference you would get by just mixing all 3 of the powders together and dumping in the case?