Are you using a fresh battery?
Make sure the bolt is LIGHTLY lubed with a dow33 based lube, or something similar.
If you still have issues then you might want to change the orings on the bolt and breech.
Also, it's my understanding that the new blackheart boards don't have QEV's on them so you might want to install one to get the dwell down.
A dwell of 27 is way too high... I'm not sure about the fire bolt, but you should be able to get the dwell down to 16 with a Techt L7 bolt and QEV.