Personally I wouldn't consider 100-150 fps "barely" +p has the same problem as regular 9mm ammo,the same +p bullet will be lower and less powerful out of a shorter barrel. 9mm +p with something like a sig 226 is probably the minimum I might feel safe with a 9mm but a Sig 226 is way to big to comfortably carry concealed so I stick with 40 and 357 sig.
Something is making zero sense in that chart you posted. Assuming that the results are FPS, this chart is suggesting that higher grain loads = lower FPS. Does not compute.
I do like the 2nd one though I'd be wearing a face visor as I have a small phobia since an accent with a Black Widow catapult as a kid where the handle broke and the widow sat on my face