I bought some Gold Dot 125 gr hp and loaded them with 9.2 gr of unique for use in my SS 4" Ruger GP-100 .357. This is from Speer's load data (max load 9.6 gr). I used magnum primers because that's all I had on hand. Speer's load data shows magnum primers with 296, h110, hs-7, & hs-6, but not with Unique. I found a load from Sierra for same bullet weight that did use magnum primers. Sierra's max load is 9.3 gr of Unique. Is this a safe load with magnum primers?