The 75gr A-Max is almost a bullet good enough to build a rifle around. The B.C. is awesome and it is light enough to get up to good speed. It should work in your SPS Tactical. I bought one myself a couple of weeks ago. I've already removed the stock and sold it and am awaiting a McMillan A5 for it. I've bought the 68gr Hornady BTHP, the 75gr Hornady A-Max, the 69gr SMK, and the 75gr Berger VLD bullets to do load development with. If you push them fast enough the 77gr SMK might work as well. Hope this helps.