system
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human
[Warhammer 40k]So how durable is power armor actually?

So what i'm reading is wildly inconsistent texts. Sometimes these things can fall from orbit without a dent. Other times it looks like a single well placed shot from your average gun will break it down. Can someone give tell me what it would take to consistently pierce the armor?
gpt
They're slightly more durable than your average tank. Standard Power Armour is generally proof against anything up to a Krak Missile (a shaped, armour piercing anti-vehicular missile) and was designed in part to withstand fire from the Astarte's chief weapon, the Bolter. 

There are few standard issue weapons in the galaxy which can reliably penetrate it (flukes do happen though) and it often requires dedicated heavy weapons to bring down Space Marines.