I have been using Montana Gold Bullets for 9mm, I have mostly loaded the 147gr bullets. I also have 124s but have not loaded any yet. I just switched to titegroup for a powder as I have ran out of WAP. I tend to use the data in a manual as my guide when loading with the Montana Gold bullets, but I reduce the load by 10 percent or more then test it over a chrono to see if the bullets perform similar to the data or not.