Big C,
I haven't got a direct answer for you but maybe a parrallel to it.
I have some old IMR powder that I use that was given to me and I am using the normal loading recommendations of the newer manuals. AAMOF I just got an older book that has the powder I'm using and it is the same. You see about 25 years ago about IMR used to be owned by DuPont the chemical and paint company and my cans have their name on them. I am also aware of old military surplus powder from WW 2 that is still being used to today. The thing to do is look at and smell the powder.
1 is it dark and uniform = good
2 does it have a moldy look to it = bad
3 does it smell like ether = good
4 does it smell more musty or like rotten eggs = bad
If it passes this test try it. Do you know if it is a double base powder?
The burn rate chart I'm looking at puts it right between IMR4831 and Hodgdon's 4831 so it would work real well in a 270 with 130 to 150 grain bullets. A 270 likes a little slower powder than 30-06 so it may be good with light bullets in your caliber but I have NO info on UM's and no mention of it in a 1970 book for any of the magnums of back then so it must be newer than that.
Hope this helps.
Ther must be somewhere on the net you can find a recipe' for it.