Yeah back on halo 2, jump melee with rocket launcher was a one hit kill. That's all I remember. I think melees did different damage depending on if you were standing, running, or jumping. Could be wrong about that bit though.
Same damage besides Sword and Hammer. However, I do think you have further melee distances with certain weapons. I'm not positive though, but it just feels like every-time I melee someone with the Magnum out, I seem to lunge pretty damn far before hitting them.
360 GT/PSN: frostysquirrels Currently Playing: DayZ, Minecraft, Dota 2