Poker Stars $0.05/$0.10 No Limit Hold'em - 5 players
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Hero (SB): $10.15
BB: $11.00
UTG: $10.00
CO: $8.45
BTN: $17.85

Pre Flop: ($0.15) Hero is SB with Q A
3 folds, BTN raises to $0.40, Hero raises to $1.60, BB calls $1.50, BTN calls $1.50

Flop: ($4.80) 3 K A (3 players)
Hero bets $3.20, BB calls $3.20, BTN calls $3.20

Turn: ($14.40) 6 (3 players)
Hero checks, BB checks, BTN bets $3.50

HERO??

Button is a really good reg running 22/19. BB is also a TAG reg who seems to be pretty solid imo. Both of these players have been playing pretty well fwiw, but when the BB cold calls the 3bet preflop I became confused.

Board is obv dry. Although I've got about $5 dollars left into an $18 pot, but am I ever any good here?

Shove the turn yourself

What's calling me if I shove turn?

Why did u 3bet pre?

btn is making standard open raise after it is folded around to him, so I think his range is wide and he will probably not continue with a lot of his opening range if I 3bet him, plus I likely have the best hand?

At 10NL probably just about any Ax, maybe even a few Kx. Your stack is about equal to the size of the pot so you're committed with a decent enough hand. I like your PF and flop play, turn is a shove for me.

Okay so what do you think btns calling range is preflop, how does bb calling influence his range, and what is bbs range?

Where is the turn (blank) barrell ? As you played it 3Bet pre (which is strong), it is imperative.

I think the BTN would normally fold the majority of his range to a 3b if the BB had folded. Since the BB adds dead money into the pot, BTN will likely call with all pocket pairs 22-JJ, and would probably 4bet/ship QQ+/AK. I have a hard time seeing him flat the 3b with dominated hands like KJ or AJ (AQ is close, not sure about that).

BB I would put his range heavily toward a pocket pair that he is set-mining. I think he knows that if he flats, the BTN will also flat, thus giving him a good price to set-mine? But I'm not really sure.

My impression of both of these players is that they are both TAG/good players for these stakes, so I don't see them spewing off monies and making super-horrendous plays.

Okay, so again, why are you 3betting this hand pre? Youre folding out all his worse aces/queens/fd's and isolating yourself vs the top of his opening range which is ahead of AQs.
If he's really folding this much to 3bets pre you should be 3betting a tight value range and a lot of bluffs, then if he starts calling more you can add hands like AQ in your value range. 3betting now shows that you have no real plan for the hand and youre only aiming to win the pot pre.

Why did you bet the flop? There are no draws out there and there are no worse aces in both villains ranges. Its fine if you know they'll peel one with TT or whatever but its unlikely given the flop is AKx and its 3way. Which hands are you targeting when you bet the flop?

I am curious as to what the btn's fold to 3b % is (if you have a few hundred hands on him). And what your 3betting history is with him. If you think he is going to fold preflop as stated above you shouldn't 3b AQs. If you think he will call you with worse hands making a 3b clearly for value than that is fine, but you are essentially turning it into a bluff here. That's not to say that it is a losing play, it's just not the best possible line. If this is the first time you have 3bet him, I would have rather done it with a garbage hand to see how he reacts rather than a hand more in the middle that leaves us with many gray situations.

what your 3bet to btn steals this is important... BTN is prob calling with most PP after BB calls aswell. BB range has you crushed.

This. 3bet a polarized range vs villains who play 4bet or fold facing a 3bet and 3bet a depolarized wider value range vs villains who likes to flat 3bets