Thought I played this one like I had a set, and the 4 low cards didn't smack villains raising range. Decent spot to bluffraise here? I'm trying to balance my turn raising range because right now it's way too heavily weighted towards value hands.

BTW, what's generally seen as a 'good' size for a checkraise? Mine are all over the place right now. 3x the villains initial bet alright? Or less?

888 Poker - $0.04 NL (6 max) - Holdem - 5 players
Hand converted by PokerTracker 4

SB: 125 BB (VPIP: 22.22, PFR: 16.67, 3Bet Preflop: 8.70, Hands: 56)
BB: 115.25 BB (VPIP: 17.65, PFR: 12.94, 3Bet Preflop: 3.45, Hands: 88)
UTG: 53 BB (VPIP: 21.43, PFR: 8.57, 3Bet Preflop: 0.00, Hands: 74)
CO: 103.75 BB (VPIP: 31.25, PFR: 18.75, 3Bet Preflop: 5.88, Hands: 98)
Hero (BTN): 108.75 BB

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has A K

fold, CO raises to 3 BB, Hero calls 3 BB, fold, fold

Flop: (7.5 BB, 2 players) 4 2 4
CO bets 3.75 BB, Hero calls 3.75 BB

Turn: (15 BB, 2 players) 6
CO bets 11.25 BB, Hero raises to 36.5 BB, CO raises to 97 BB, fold

CO wins 83.75 BB

probably an over pair or even A4 or something...enough to call IP with some steal equity in position