ToME: the Tales of Maj'Eyal

If you have the Ammo creation ability, the types of ammo that can be forged via the "Forge ammo" command under the 'm' menu depend on S:
If S?1, you can forge shots from rubble. [We will describe the process for doing so here, since it is different from that of forging shots and bolts, and this difference has apparently confused many people (including, at one time, the author): First stand next to the pile of rubble; then select the "Forge ammo" skill under the 'm' menu , select "[S]hots", and indicate the direction to the pile of rubble when prompted.]
If S?10, you can forge arrows out of junk in your inventory or at your feet ("junk" here means things like Broken sticks and Elf skeletons -- but not skeletons dropped by killed monsters).
If S?20, you can forge bolts out of junk in your inventory or at your feet.