Sorry for necroing a 5-month old topic but it's about time someone posted something more complete and accurate.

Notes:
- The following states the average time in seconds between the start of the firing animation of an individual soldier or artillery piece
- Gunpowder infantry are assumed to be in a two-rank dense line formation and in fire-by-rank mode
- Flaming, exploding or rotting ammo have no effect on artillery firing rate
- The larger the unit size, the more the firing rate may vary
- In some cases an individual may skip a volley even though there is a target in range and in clear line-of-sight

Infantry

Javelin 19
Bow 11/22
Crossbow 17
Naphtha Bomb 9
Gun 32

Cavalry

Javelin 9
Bow 11.5
Crossbow 14
Jezail 13.5
Pistol 14
Elephant Gun 11
Elephant Artillery 13.3

Artillery

Ballista 17.75
Catapult 22
Trebuchet 29
Bombard 30
Grand Bombard 30
Cannon 20
Culverin 20
Basilisk 20
Monster Bombard 26
Mortar 23
Serpentine 21.5
Ribault 25.5
Monster Ribault 30.5/88
Rocket Launcher 41.5