Where did you get this information from?
Hodgons own website https://www.hodgdon.com/tripleseven.html states "Triple SevenŽ is a revolutionary black powder substitute that cleans up with water alone."
So a) the manufacturer claims it is a BP substitute
and b) Since when can Nitro powder be cleaned with water alone?
Their website also offers 50 grain pellets for use in 44/45 revolver......