Amount of XP from killing Graveward

So I have been on Mayhem 4 killing Graveward for a while. Each kill I get about 48k xp. I remember this being higher a while ago on Mayhem 3 before 4 was available.

I know offline use to give a bunch but I am talking online and killing him. Has anyone else noticed this or am I a crazy person?

I should add that I am playing on Xbox.

On M3 it was always 36k.

OK good to know. I dont know why i got it in my head that it was more than that. Thanks for your response! =)