There was also a try for Denis Hickie to mark his return to the starting line up after injury.
Although skipper Paul Thomson got an early try for the visitors and Charlie Hore added two penalties, it was all one way traffic for much of the game with Brian O’Meara collecting two penalties before the try fest began.
Brown collected his first of the night, and Hickie the second with Felipe Contepomi, taking over the kicking duties from an off form O’Meara, adding a conversion and a penalty to build a 21-13 half time lead.
The Puma added a second penalty just into the second period before James Norton and then Brown crossed to make the lead 34-13.
Two minutes later Brown had his third and as the clock ticked into injury time Norton was able to sneak in for his second and his team’s sixth of the evening.