I was trying for a last minute M4s clear and the group I joined entered before reset but wiped with insufficient time to clear properly before reset time, so I went to leave and some guy claimed that as long as you enter and pull before reset, if you clear the loot is considered last week's (doesn't count as new week's loot).
Is this really true? I really didn't want to play chicken with a whole week's worth of loot with friends waiting to do weekly clears together, so I left anyway. Daily resets don't work this way so I call BS but I'd like to get actual confirmation.