Originally Posted by dksuddeth

'cop killers' is a term that is used much the same way that 'assault rifle' is used by the anti set. It's a term used to incite fear that an item has only a specific sinister purpose.
The reality is that any big game rifle round is a 'cop killer', meaning that it has the energy to penetrate most level 1 and 2 types of body armor, those usually worn by police officers. Some handgun rounds also have this ability, but since police are usually the 'only ones' to wear body armor, they get called 'cop killers'.