Is the Perc suitable for recording for full velocity range sample libraries.

Perc is not 100% noiseless and is making a slight quiet sound by itself. Because of this, sampling on the lowest velocities where there's no louder impact on the instrument can be problematic as it will add its own "click" sound to the recorded material (which will be surely noticed by precise microphones). Also, a single Perc beater might not be strong enough to power up large kick drums on the highest velocities.