The below article help me tremendously with my 6.5x284, results will vary with every barrel. But this should be a great start.
http://www.accurateshooter.com/cartridge-guides/65x284/
I am sure you will find a load, there tricky sometimes. I have shot next to John Brewer who exclusively shoots a 6.5x284, if you google him, you should pull up several articles.
Dennis
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