WPR 280 Powder

signal4l

New member
I recently acquired about 8 pounds of wpr 280 powder. I believe this is old military surplus powder. It is all in sealed metal bottles with the with the above designation on a sticker.

Can anyone identify this powders commercial equivalent?

I've done some Googling but can't turn up much information. My limited research suggests 5 grains of this might make a good 9 millimeter load.
 
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