$25 NLHE Full Ring: Do I double barrel here, c/f, or ?

$25 NL HE Full Ring: Do I double barrel here, c/f, or ?

Stacks:
* MP1 with $7.40
* MP2 with $40.96
* MP3 with $25.35
* CO with $29.74
* BTN with $24.99
* SB with $25.25
* BB with $12.50
* UTG with $0.00
* UTG+1 with $46.80




Site: party poker
* * Dealt to SB:A♣ J♥
* * Sklansky group 4
Preflop:
* * 3 players fold.
* * MP2 raises [$0.85 USD]
* * 3 players fold.
* * Hero raises [$2.70 USD]
* * 1 players fold.
* * MP2 calls [$1.95 USD]
* * Total folds this street: 7
* * Potsize: $5.75
Flop:
* * J♣ 2♠ K♦
* * Hero bets [$3.50 USD]
* * MP2 calls [$3.50 USD]
* * Potsize: $12.75
Turn:
* * 8♥

Poker Hand Converter By Cardschat.com Poker Forum

First time I've posted my own hand analysis. First off, this is Rush on FT so no reads. Second, I don't really like this format...can anyone suggest a site to convert hand histories?

Third (most important), what is my line here? Do I have to assume he has a King, or did he just float me? I've ran into this 1,000 times and I've read stuff about when to double barrel, but I feel like this example would help me understand it a little better.

http://www.stoxpoker.com/pokertools/handconverter/ this is much better converter. The CC one in all fairness is complete crap.

First off, any particular reason why we are 3betting AJ vs unknown?

I supposed I've been doing that a bit too much lately. I've been watching sixpeppers' video on cardrunners, and he 3-bet a lot from LP with significant results (on rush). Today I've just been experimenting with 3betting. Obviously thats mistake number 1. But the question is, what do I do here given that I did 3bet?

3-betting for no particular reason vs. unknown with an easily dominated hand OOP sounds like a recipe for burning money. Are you 3-betting here because it sounds cool?

I bet $8 to confirm whether he does indeed have the K, or whether he was snap-calling the cb on flop. If he raises Im folding.

I guess in this particular situation I didn't like flatting with AJ in the blind, so it came down to 3bet or fold. I basically 3bet for information to see the strength of his hand. In rush a 3bet outta the blinds works over 50% of the time...when I get home from work I could look at my 3bet stats and give you an exact number.