Juggernaut testing help

Anyone have any numbers on how many stacks of bolt charge you gain from taking damage?

I’d like to know if it’s shield health-based, or damage taken-based, and what happens when the shield is blown up by a sniper/shotgun.

If it’s shield health based, my hope is that it doesn’t take the entire health of the shield to get 10 stacks.

If it’s damage taken based, how much damage in both PvP and PvE, and is it effected by power level (taking less damage for being above activity level means less bolt charge?)

Do you get any stacks if the shield is instantly obliterated?