4759 is one of the best powders you can find for cast bullet reduced power rifle loads. Damnit, now I'll have to consider buying some more while the supply still lasts. And I just sprung the bank for 8 cases of loaded STS's & Nitro Traploads.
If you use PB I got a can I can bring out there and give you when I get to Great Falls in the spring. Also a couple of cans of SR4756 if you're interested. This stuff is so old it says "DuPont" on the cans and one of 'em still has the price tag $2.19 for 8 oz. but I think it's still good.