It does burn dirty and leaves a strange powder residue, but I had a 7mm rem mag with a tight barrel , that would do strange pressure excursions with faster powders that loved it. I used the H870 behind 162 noslers for consistent half inch groups,. I used a bit in a .264 win mag also with decent results. I also used a full case of it behind 120s in a .25-06 , dirty and only fair accuracy, but it was FAST.......... I do not have specifics, but it can all be found in a Nosler # 3 manuel.
