If the Drum Track is MIDI, the yes, you should be able to change the velocity of individual notes in the Piano Roll window.

Select the Drum Track (top left), make sure velocity is selected, then adjust the velocity of each beat by dragging the vertical bar.

Attached Files (Click to download or enlarge) (Only available when you are logged in)
2017-11-27_11-22-19.jpg (163.81 KB, 54 downloads)

BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones