Big oops, mistakes gone too far. Felt like I had it and was curious to see the results. I probably should have cut my loses from the 4-bet preflop? SB always gets me into trouble.

NL Holdem 0.25(BB)
HJ ($49.65) [VPIP: 5.1% | PFR: 2.6% | AGG: 0% | Hands: 39]
CO ($35.09) [VPIP: 27.8% | PFR: 27.8% | AGG: 40% | Flop Agg: 60% | Turn Agg: 33.3% | River Agg: 0% | 3-Bet: 33.3% | 4-Bet: 100% | Fold to 4-Bet: 0% | Hands: 18]
BTN ($33.86) [VPIP: 70.6% | PFR: 11.8% | AGG: 40% | Hands: 17]
HERO ($24.88) [VPIP: 36.7% | PFR: 26.7% | AGG: 44.8% | Flop Agg: 41.8% | Turn Agg: 45.3% | River Agg: 50% | 3-Bet: 11% | Fold to 3-Bet: 46.9% | 4-Bet: 18.8% | Hands: 784]
BB ($45.90) [VPIP: 39.7% | PFR: 30.2% | AGG: 21.9% | Hands: 66]
UTG ($37.31) [VPIP: 13.6% | PFR: 9.1% | AGG: 20% | Hands: 22]

Dealt to Hero: A K

UTG Folds, HJ Folds, CO Raises To $0.60, BTN Folds, HERO Raises To $1.25, BB Calls $1, CO Raises To $5, HERO Calls $3.75, BB Folds

Hero SPR on Flop: [1.77 effective]
Flop ($11.25): 4 J 7
HERO Checks, CO Bets $3.61 (Rem. Stack: $26.48), HERO Calls $3.61 (Rem. Stack: $16.27)

Turn ($18.47): 4 J 7 2
HERO Checks, CO Bets $26.48 (allin), HERO Calls $16.27 (allin)

River ($61.22): 4 J 7 2 8

What do you think you are beating on the turn

Is 5BB your standard 3b size from the SB?

Looks like a trivial preflop shove to me.

I mean I felt like I made a big mistake but yes I just wasn't sure if I should have called the all in on the turn. But I played correctly?

Instead of calling preflop, I should have shoved or raised? Would that be fold equity or whatnot? Yeah they would have folded that K6 if I did raise, would of gone positive on the hand if I did.

I'm not sure what my standard 3b size should be, what should I go for?

Preflop 3b size is way too small (should be about $2.50ish), and vs the CO reraise you should probably be stacking off, especially if you use a better size for your 3b.

Actually flop x/c might be ok, maybe you didn't play every street wrong.

Turn is a snapfold. You have A hi vs some fish in a ~4bp and he's psb jamming you ott.

Also, it's irrelevant that "you would have gone positive if you did something else."

You have to objectively look at the quality of your play and not the results. In poker a good amount of the time the "right play" will lose money and the "wrong play" will make money. Results in any one hand are basically irrelevant when it comes to thinking about whether we did the right thing in the hand.

First off I would like to thank everyone for taking the time to comment. Second, I'm not too familiar with the jargon and would appreciate an explanation of what "stacking off", "Psb jamming you ott", and "flop x/c". But seriously, thanks again for commenting, this is exactly the type of material I was hoping to get by joining this forum and community.

Yes, I will try to focus on the objectivity of my play rather than the results and thanks for the sizing suggestion on the 3bet.

"Stacking off" means you put all of your stack in the pot. In this hand, that should have happened preflop. Your very small 3bet makes it a little bit awkward because villain 4bet to only 20BB but there isn't any other sizing that really works.

Fold equity plays a role because if everyone folds you net $7.50 which is a great result. If villains calls with a very strong range, you have roughly 40% equity. That's not too bad.

"flop x/c" means check/calling on the flop
"Psb jamming you ott" means a pot sized bet all-in on the turn

Perfect, thanks for the explanation. That makes plenty of sense, but honestly I wouldn't have ever thought to shove after the 4bet from CO. Is there a decent guide I can refer to such as the ranges I should be stacking off in similar situations?