NL100: AJs, NIT calls raise in blinds and calls cbet

[Aquadougs]

Party Poker, $0.50/$1 NL Hold'em Cash Game, 5 Players
LeggoPoker Hand History Converter

BTN: $246.27
SB: $118.24
BB: $113.11
UTG: $420.53
Hero (CO): $105.58

Pre-Flop: A[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/heart.gif[/img] dealt to Hero (CO)
UTG folds, <font color="red">Hero raises to $4</font>, BTN folds, SB calls $3.50, BB folds

Flop: ($9) 5[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $6.50</font>, SB calls $6.50

Turn: ($22) 4[img]/images/graemlins/club.gif[/img] (2 Players)
SB checks, <font color="red">

What is his range?
How often would he fold to a second barrel here?

[sixhigh]

$16. He has a king or a lower pair most of the time. Most likely he'll fold any non-king hand.

[orange]

flush draws, straight draws, Kx, sometimes 88 and the like. i think that he's calling a turn bet.

[Aquadougs]

Which draw-combinations do you think he called the cbet with?
So if we knew he would call a turnbet with that range, should I second barrel then?

[b2l_cricket]

I have though some about situations where you fire a second barrel on a board where a lot of the villains range is draws. When you do this should you be firing a third barrel a lot of rivers that miss the draw. This hand is not really a good example because the A high has some showdown value vs missed draws. Also the paired turn a and villain oop he probably should not be calling with just a draw. But in spots where you have little to no showdown value and a draw is a large part of the villains range do you guys think firing three barrels is good?