Quote:
Originally Posted by Icelander
Aside from steel plates, all rigid modern body armor is semi-ablative at best.
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I'm aware of that, but it's not the default rule for body armour in GURPS.
As for protection, my understanding is that armour with a certain NIJ rating is supposed to also protect against those threats that lower ratings protect against as well. The big problem with those ratings (and similar ones) is that they are only rated and tested against very specific bullets, and apparently similar bullets can perform much better or worse, and even fairly small increases in velocity and energy can result in penetrations.