Everyone knows that calling card right? Um, I just went 35-0 and I didn't get it. Was I supposed to stop at 30. Or is this some glitch or something.
You can use killing scorestreaks during it. You just have to have 30+ kills with bullets from your gun on top of the kills with the scorestreaks.
Yeah, It can be used with killing scorstreaks, but easier with uav/cuav/vsat. If you wanna use lethal scorestreaks, you can always keep track on your gun kills by the milestones bloodthirsty/merciless/brutal medals.
Edit: and its much easier if you have friends helping you with vsats and emps