COBR-A has always been 6 shot AFAIK, even with HB2. Now you can slap HB3 on it since they buffed it not too long ago and gave it -10% damage penalty that HB2 used to have. APBDB doesn't have the most up to date info though so if you want to see how current HB3 affects weapons damage wise, you gotta go with HB2 in the modding menu.