H1000 was developed and is made in Australia by ADI it is called AR2217 here and is the exact powder freighted to the US then repackaged by Hodgdon in the US as H1000.
All of the Hodgdon Extreem powders are ADI manufactured aswell as some for other companies like IMR and Winchester also Remington for bulk loading. ADI makes over 100 different powders for all over the world and only a few are sold to the public.
Cheers Bill
Australia
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