I began shooting in high school and obtained a lifetime master rating in smallbore. Now I am an ole geezer who just bought my first pistol - glock 23 40cal S&W and starting to reload next week. I bought a Dillon press, hornady 180gr bullets, winchester primers, and Unique powder. My question to all of you- I have some old HS-6 powder I used before. Should I use the Unique or HS-6 with what I bought?