

Regular bullets fired out of regular firearms basically disintegrate in water. Counter-intuitively, putting more energy into a bullet only worsens the results, making it stop even faster.
Underwater firearms do exist, but they are not common, and even they have incredibly limited range. As far as I know, none have effective range greatly exceeding 50 meters, let alone 100.
Every source I can find mentions maximum effective range at 15ft to be ~98 feet, not 909. So that zero in the middle is probably a typo, if I had to guess.