Consider the level 5 ranger daily power Flying Steel:
Effect: Until the end of the encounter, if the target ends its turn without cover from you, you can make a ranged basic attack with a weapon against the target as an immediate reaction. This effect also ends if the target has cover from you at the end of any of your turns.
If I were to take the Archery Mastery feat and gain Rapid Shot or Clever Shot, can I gain the effect for the ranged basic attack?
Effect: You make a ranged basic attack with a weapon against each creature in or adjacent to a square within the attack's range. You take a −2 penalty to the attack rolls.
I'm about 90% sure that I can't do that, although the effect does say: make a ranged basic attack.