it modifies the DV, instead of counting at base DV
for examples of why that is important see "hardened armor"

on a side note could you point me in the direction that shows burst fire doesn't count against modified DV?

Page 143 BBB top of page is only mention burst fire not effecting DV vs. Armor. This is obviously in need of clarification but I think has been well established on boards here. Additional rounds fired don'nt count towards DV when compareng it too armor. I think there should be a clear difference. Modifiers to DV and additions to DV, with modifiers not counting towards armor comparisons.

Makes sense if you consider its a penetration issue, if first round is'nt powerful enough to pierce your armor, why would the others be?

Edit: That might need some clarification the check vs armor is simply to determine if damage is physical or stun or if it will penetrate hardened armor not against damage resistance checks. That make sense?

it could be less penetration damage and more internal bleeding and contusion broken bones, torn ligaments etc... even if you are completely armored it still REALLY hurts.

thanks for the reference btw, the reference on 141 I took to mean full bursts.

I think this is why you still resist the full modified DV and take stun damage even if armor beats the unmodified DV.

That's the other thing I was wondering about: if using a called shot to add to the DV of a weapon counts towards penetrating hardened/vehicle armor. But I assumed that since it's compared the same way like normal armor is to check for stun damage instead of physical, then the same modifiers would be used to check to see if you damage a target with hardened/vehicle armor or not.

That is, everything that increases DV counts except narrow burst fire.

That's my take on it.