50.0: 2808 fps
50.5: 2849 fps
51.0: 2877 fps
Based on the velocity of the 51.0 load I did not shoot the 51.5 or the 52.0 loads I had with me.
I think you are there and your rifle shoots similar to mine. I could go higher with only slightly flattened primers but no need to push it too hard. I am staying at this level and 51.5 for the 129-130s.