400nl: Is double barrelling oop here on blank turn good/bad?

[BlackAMEX]

Villian is a 21/15/2 reg who i have played with alot.

How bad is a turn bet here? I figure I fold out most hands except K10+ here (am I wrong? is he calling down lighter?), and I think villian would rr with KQ pf, although it still may be in his range.

My bet sizing is bad (should have bet about 64), but is the play solid?

Party Poker No-Limit Hold'em, $4 BB (4 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($396)
BB ($500.84)
UTG ($1)
Button ($334)

Preflop: Hero is SB with A[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $16</font>, BB calls $12.

Flop: ($32) 8[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $24</font>, BB calls $24.

Turn: ($80) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $52(???)