[Guedes747]

This is not accurate, but for my experience id'e say:

1 Minigun shot = 90% HP
1 Rocket launcher / heatseek shot = 85% HP
1 M4 shot = 10% HP
1 Tec9 / Mac / MP5 shot = 4% - 10% HP
1 9mm shot = 5% HP
1 AK47 shot = 10% HP
1 Sniper shot / country rifle = 35% HP
1 Shotgun shot = 30 - 40% HP
1 Sawn off shot = 30% HP
1 Combat shotgun shot = 35% - 40% HP
1 Grenade explotion = 90% - 100% HP
1 Desert Eagle shot = 35% - 40% HP


Damadges change with distance, bigger the distance, less damadge, except for sniper.