Cliff I would not assume 2800 fps to be the magic ingredient to give you the best accuracy. I suggest you choose a proven powder such as Varget, 4064, RL15 and do a ladder / OCW test starting at 42.0 grains and work up in 0.3 increments to define the nodes for that combination in your barrel; then you will know for sure. Google "OCW" to obtain a full description of the procedure; it's simple and fast and gets you the most "bang for the buck". You should find a couple of nodes at approx 3% difference in powder so you can choose either the slower or faster one based on your needs for refinement.