You have DuPont before they were called IMR and of course before Hodgdon absorbed them ? I’ve got very little experience with 700 or 800 X , but with what you have I’d look at an older IMR manual or possibly a manual from DuPont which would be older yet and see what charge weights they had against what Hodgdon says for the 700X of today . I’d be willing to bet it won’t be more than a grain or two difference .
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Parker’s , 6.5mm’s , Mannlicher Schoenauer’s and my family in the Philippines !
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