This 9mm ammunition is built to be fired in contemporary 9x19mm (9mm) firearms. Q: 9mm - 124 gr Hydra-Shok JHP - Federal Legislation Enforcement - 50 Rounds Is that this a +P round? Posted On: 2/eleven/2013 By: Al M A: Federal hasn't formally classified this as being a +P round. Although some firearm makers suggest against using +P ammo inside thei