Pick up 8# of Magpro, use the Magpro loading data from Accurate Powders and you won't try anything else.
You may have to email Accurate to get their load data for the .280AI.
I think my best load was 64gr of Magpro behind any number of 160gr class bullets.
Astonishing speed, superb accuracy, and easy metering for throw and go.
24" barrel minimum IMO.
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