This expert move is not in my arsenal, so I'm at a loss to put him on a range. I'm guessing it's quite strong since I'm utg and he hasn't seen me showdown a 4bet hand yet. Villain's running 21/17/2.6 and he's 3bet me enough that I'm comfortable felting JJ pre-flop here.

Full Tilt Poker, $2/$4 NL Hold'em Cash Game, 6 Players
LeggoPoker.com - Hand History Converter

SB: $995.65
BB: $436.40
Hero (UTG): $418
MP: $382.60
CO: $400
BTN: $1,118.80

Pre-Flop: J J dealt to Hero (UTG)
Hero raises to $14, 2 folds, BTN raises to $48, 2 folds, Hero raises to $128, BTN calls $80

Flop: ($262) 7 7 K (2 Players)
Hero has $290 behind...