From the "experience" file.....
H4831SC is as close to H4831 as Hodgdon can make it.
However,
all powders vary from lot to lot. So always back off a little and see how much different they are for your application.
I won't go into detail, but if I didn't have a 1917 Eddystone action, my nickname would be "Old Bolt in the Cheekbone".
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