Yeah, I have. I got a 79kills - 8deaths using the Attack Helicopter, Reaper (Always gets me like 7 kills) and the Pavelow, I use Hardline so its a 6, 8, 11 line-up so-to-speak. And it just keeps on looping around. The Attack Helicopter gets the Reaper, the Reaper gets the Pavelow, the Pavelow usually gets the Attack Helicopter, the Attack Helicopter gets the Reaper and so on...
I usually get this on Domination, but I've had this on Kill Confirmed too.