[UT] [HT] 15mm Gyroc White Phosphorus

[Grayscale]

I'm trying to design a 15mm Gyroc (6d pi++) combined with the White Phosphorous warhead option from High-Tech (HT172) - I understand the rules mention 20 mm as the minimum caliber, but I'm choosing to overlook this.

So, HT says:

...Add a (0.5) armor divisor and a follow-up burning explosion with burning fragmentation. Hot fragments (p. B415) do 1d(0.2) burn every 10 seconds for a minute...

But what is the burning explosion damage?

6d? That would result in a 12 yd blast radius - contrast that to the HEC option from UT (which I'm also using) that for a 15mm Gyroc results in 2d cr ex and so a 4 yd blast radius.