280 Ackley Improved and Accurate A4350 Data

The only data I found specific to the improved was from a book by John J. Donnelly - he lists data for a single 175 gr. load, with the source as "Ackley" and the propellant as "4350" (IMR? H? AA?), so it's not worth repeating here.

Hopefully somebody else has something a lot better available!
:)
 

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