Hey, so I was scrounging around and I found a bunch of dice with intervals of 5 going up to 25. I think these were in the IoB set but IDK wtf they are used for.

Aren't they for Armageddon (or was it Apocalypse?), aka 40k with enough points to actually field titants/super heavy tanks etc?

IDK but every single starter set I bought had one of them (Macragge, Skull Pass, AoBR, IoB)

I have one of those, came in a much older set of dice. My mate said they were old artillery dice. He was very temped to try using it in a future game, just to see if anyone would notice! XD