My guess is that you're using either Bad Juju or Bad Juju against any Ultra or Major in the game - just a guess since that's the only weapon I can think of that takes more than one magazine to drop an enemy. Pulse Rifle's are receiving a buff by the end of February - whether or not Juju will be a serious contender against Ultras after the buff, I have no clue. Just curious what weapon you're using. :-)