So I pondered about the durability and toughness of space marine armour, like how many bolts, Las shots or bullets would it take to damage and kill the wearer or show any sign of penetrating. I'm aware there are different types or boltrounds but I'm not that well versed in how a normal bolt round would affect power armour.
I also noticed that there are times where bolters could bounce and deflect off power armour, or lower technological weapons would be used against said armour like solid slug weapons. I'm not sure if different calibres, metals or rounds have been developed.
Like if a chaos space marine armed with a ballistic machine gun were to flank a loyalist space marine, would he even damage the armour or just shoot to suppress and pin down the loyalist marine or would he be better off just using a lasgun since they are considered more powerful than ballistic weapons.
So many questions that leave me confused about weapon and armour consistency and I'm unsure if I worded all of this correctly.