Is it better to DoubleBarrel in this spot

[lead24]

BTN: $50.75
Hero (SB): $24.55
BB: $66.70
UTG: $27.15

Pre-Flop: Q[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img] dealt to Hero (SB)
2 folds, <font color="red">BTN raises to $0.50</font>, <font color="red">Hero raises to $1.50</font>, BTN calls $1

Flop: ($3) 4[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (2 Players)
BTN checks, <font color="red">Hero bets $2</font>, BTN calls $2

Turn: ($7) 3[img]/images/graemlins/diamond.gif[/img] (2 Players)
BTN checks, Hero checks

River: ($7) 7[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">BTN bets $4.75</font>, Hero folds

Results: $7 Pot ($0.35 Rake)
BTN mucked and WON $6.65 (+$3.15 NET)

he was like a 70,30,2.5

his pfr's were all minraises. I also saw him call weak on the flop a few times. He was folding to my bets on the flop, this was the first time he called me.

So would it have been smart to bet the turn and try and take it down there.