Munster got the win and the bragging rights over Leinster at Croke Park last night.
They toppled their biggest rivals for the first time in five attempts with a 17 point domination at GAA HQ.
It leaves Clayton McMillan's side top of the URC table and 12 points clear of the defending champions.
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Ulster are fourth after they picked up their third win out of three with an 8 point win away at the Sharks.
