This is the first hand of the tournament so no reads. When I raise pre and barrel the flop and turn I've shown enormous strength and yet the CO still wants to jam all his chips in. I doubt any competent player will do this with a Jx so his possible combinations are two pair, sets, straight/flush draws. Early in a tournament, though, I doubt anyone is jamming on a semi-bluff on the turn vs someone double barreling, right? Looking back over the hand now I feel it's a clear fold. Thoughts?

Poker Stars $15.00 No Limit Hold'em Tournament – t10/t20 Blinds – 7 players
TournamentPokerEdge.com Hand History Converter

BTN: t3000 150 BBs
SB: t3000 150 BBs
BB: t3000 150 BBs
UTG: t3000 150 BBs
Hero (UTG+1): t3000 150 BBs
MP: t3000 150 BBs
CO: t3000 150 BBs

Pre Flop: (t30) Hero is UTG+1 with A A
UTG calls t20, Hero raises to t80, 1 fold, CO calls t80, 3 folds, UTG calls t60

Flop: (t270) 7 3 J (3 players)
UTG checks, Hero bets t165, CO calls t165, UTG folds

Turn: (t600) 8 (2 players)
Hero bets t380, CO raises to t2755 all in, Hero calls t2375 all in

River: (t6110) 4 (2 players – 2 are all in)