Those figures are not too bad considering the speeds you got up to and the fact it was fully loaded.
I’m not sure of the merit of pushing it as hard as you did to clean the DPF.
As far as I’m aware the DPF goes through a regen process when needed and I don’t think you can actually force this by your driving style.

Black smoke out the exhaust when pushed may indicate your EGR valve needs cleaning.
When I first got my X5 it would smoke quite badly on anything more then gentle acceleration. If you pushed it hard from a standstill you almost couldn’t see the cars behind it was that bad.
Since I cleaned the EGR valve and changed the extremely dirty air cleaner, the problem has all but disappeared.
It still puffs a small amount of smoke on hard acceleration which isn’t noticeable during the day, but at night you can see a very slight haze in the car headlights behind.