Bird bomb rounds are single projectiles with a match fuze with the same damage profile as a Rifled Slug but doing EXP-DMG as a S. EXP.
Weapons loaded with bird bombs possess the Match Fuze attribute.
Bird bomb rounds are fireworks fit inside a regular shotgun shell, meant to scare away birds and other such agricultural pests. Some devious souls within Oceanyka replace the black powder within these bombs with high-explosives and fit a thin steel cylinder over it, creating extremely unreliable airburst explosive shells.