Don't listen to Sunray he doesn't know what he's talking about. It is military surplus powder sold by Higginsons about 8 years ago. Fine grained Ball powder.
I have used and still use this powder, It has a burn rate very close to H450, I use it in .270 Win with 130gr bullets and magnum primers I started at 54gr and found a real nice accurate load at 56gr with no pressure signs, YMMV.
Good powder, IMHO