[FanIn80]

I haven't read anything to confirm this, just basing it off my own experience, but it looks like blues cap at 240 and purple engrams at 265. Only way higher is from powerful engrams (night fall, raid, clan rewards, etc). Also legendary armour/weapon mods.

Edit: Also, someone mentioned in party chat yesterday that raid requirement is 290. Again, I haven't confirmed this. It seems logical, though, and could very well be common knowledge to everyone. I've just read very little about the game so far, so I'm piecing this stuff together as I go.