I have been working on a MIDI rendering of a piece that I am working on. Some of the dynamics were not carrying through from the score that I have made in Noteflight, so I decided to create this test and export it as a MIDI file:

I then imported the MIDI file into Logic Pro X v10.5.1 and obtained these results:

Pianississimo ppp – 15 / 127
Pianissimo pp – 31 / 127
Piano p – 47 / 127
Mezzo-Piano mp – 63 / 127
Mezzo-Forte mf – 79 / 127
Forte f – 95 / 127
Fortissimo ff – 111 / 127
Fortississimo fff – 127 / 127
Here is the MIDI file that I used if you wish to perform the same test in your own DAW:
Feel free to download the results as a PDF: