I recently purchased a large estate containing many firearms, ammo, and reloading equipment and supplies. There in lies the question what year(s) did Hodgdon pack powder in 8 pound plastic bags inside a cardboard box? I have two of H4895 and the boxes state Newly Manufactured. On the end it says: When opening use knife carefully plastic bag inside. Thanks for your help.
I have H-110 and H-4831 that came in paper bags, 10 to a divided cardboard box. I got that powder in the late '60's. No, I'm really not that old...
So, what you describe seems similar and is probably from that same vintage.
My 4831 is great powder, seems to perform as well if not better than new stuff. Both powders look great, smell good, no brown dust or signs of deterioration. But I've taken care to keep them in a temp controlled invironment most of the time. The paper bags got so brittle, I transferred the powder to empty powder cans, relabeled with a Magic Marker.
DF