Try the 208 gr amax over about 48.5 gr of RL17 in win brass.
My last chrono results were 2600 fps out of a 22" barrel.

If you have a 26" barrel, run it at about 3.2" in a throated barrel, neck sized
win brass, you can get about 2750.

2600 is enough FPS to stay supersonic out to 1400 yards