I have a Laser Cast Manual, but it doesn't list that powder. It does list the following though if you have another preference,
HS-7 and 7, Unique, AA-9, H110, 296, and 2400. If your not in a rush, shoot me a PM I will throw some data your way. Might be later on tonight or tomorrow though.
To be honest with the ones I have shot I simply loaded them over what I had the most of on hand, which was usually 296 or A-9. I worked them right up to magnum velocities with no ill effects in my Redhawk. I have also run the .357-158gr up to top end as well out of my GP-100.
Just make sure you get all of the copper out ahead of shooting them however as once they start to foul they get the job done quick, and it's a pain to scrub out.
Good luck and hope this helps.