That was with BP in my 45-70 BPCR for 10 shots. Shot HORRIBLE!
Now my best load in the .44 with a 320 gr LBT has an SD of 11.5, MAD of 9.9 and ES of 29.
What we do is find the most accurate loads that do not change day to day, month to month or year to year and chronograph them to see the velocity. We ignore the other figures.
If every single shot was the exact same velocity, I don't think it will make any gun shoot better.
If your twist or gun does not like a boolit or bullet it does not matter what your figures are. You could burn 5000 rounds with the wrong bullet or velocity with a zero SD and not hit a thing.