”Firing a second barrel” is a term for a very specific poker situation: you have raised pre-flop and then bet the flop (called a Continuation Bet or C-Bet), and your opponent has called you. On the turn a card comes that doesn’t help you, and you bet again as a bluff. This is called “Firing a Second Barrel” because you have fired one bluff on the flop, and another bluff on the turn.
The incentive to fire a second barrel is quite obvious: There is good money in it. Lets assume you have raised to 3BB from the button pre-flop, and get called by the Big Blind. That’s 6.5BB. On the flop you make a continuation bet of another 4bb and get called. That’s 14.5BB in the pot. Now your opponent checks to you on the turn; should you bluff again?
Well, there are certain situations where firing a second barrel is effective, and other situations where firing a second barrel is just throwing money away. If you can correctly identify the effective situations, then you will be able to take down many medium sized pots that you would have been unlikely to win otherwise.
Lets look at it from your opponent’s point of view: You have raised pre-flop, bet the flop, and fired another barrel on the turn. You opponent knows that you could be doing this with a complete bluff, a semi-bluff, or a very strong hand, and this puts a huge amount of pressure on them. If they call the turn bet, they know that there might even be another bet on the river, potentially all in. It’s a difficult situation to be in, and whenever you put your opponent in a difficult situation, there is a good chance that they will make a mistake.
A player will usually just call a flop bet, rather than fold or raise, for a logical (or semi-logical) reason. The main reasons are these:
1. They have a strong hand and are trapping.
2. They have a mediocre hand, and don’t want to build a big pot.
3. They have a straight draw, flush draw, or some other draw.
4. They are intending to bluff.
5. Some combination of the above (like bottom pair and a gutshot)
In most of those situations, the player is likely to fold to a second barrel fired on the turn. (Draws that hit, and strong hands that are trapping are the obvious exceptions)
Here is an example to illustrate the power of the 2nd barrel.
Imagine you are in the BB with A8s. I raise to 3BB from the button, which I’m likely to do with a wide range of hands, and you call. The flop is A 9 4 rainbow. You check to me, as is usual. I make a continuation bet of 4BB. You can call or raise. You decide that if I have an Ace, you are just as likely to be ahead or behind. Your hand is possibly not strong enough to raise, since any worse hand like KQ will just fold, and any better hands will call. However if a K or a Q comes on the turn or river, you might get 1 more bet out of me. Also if I raised with a pocket pair like JJ or TT, I wont call a check raise now with the Ace on the board, but I might call a small bet on the river. There are no draws to be concerned about.
All in all, you decide that your hand isn’t big enough to build a large pot, and you could just as easily be behind as ahead, and that you therefore maximize your Expected Value (EV) by just calling.
The pot is 14.5BB. The turn comes J. You check, and I fire out another bet for 12BB. That’s about 80% of the pot. You realise that if you call, the pot will be 14.5 +12 +12 = 38.5BB. That’s a pretty big pot. If you call this one, you might get hit with another bet on the river, which might be as much as 40BB. That would be about 65BB you’ve put into this pot, just to see a showdown with your top pair, mediocre kicker. Now your A8 isn’t looking so good. You start thinking that your opponent isn’t likely to have bet the turn with a weaker Ace than you. Maybe your opponent has two pair with AJ, A9 or even A4? Maybe he just has a big kicker like AK or AQ? You’re losing to those ones too. Perhaps he flopped a set, and is trying to get you pot committed? Heck, maybe he raised with J9 offsuit, and got lucky on the turn?
You don’t really want to call a big bet now if you can’t call another one on the river, which is probably what you would have to do if you opponent decides to bet again.
Perhaps you decide to call and perhaps you decide to fold, either of which could be a huge mistake depending on what cards your opponent actually has. I know that I would have trouble calling a big bet like that on the turn with only top pair and an 8 as a kicker. It’s scary. The button player can’t believe that I have less than an Ace at that point, so the chance that I’m beaten rises dramatically with each additional bet.
Let’s change the scenario slightly. Let’s say that you called in the BB with 9Ts. You hit middle pair on the flop. You’ve seen me raise from the button with some real rubbish hands, and that I make a C-Bet almost 100% of the time. You think that there is a solid chance you are ahead with your middle pair on this flop. Again you decide not to raise, because most better hands (like any Ace) will call, and all worse hands will fold. You might be able to get a hand like JJ or QQ to fold if you check raise, but you think those are reasonably unlikely, so you aren’t overly concerned about those pairs. You consider raising to protect your hand against random overcards, but you still don’t want to build a big pot out of position with only middle pair, so you just call the flop bet and see what happens on the turn.
Again the turn is the J and you check to the aggressor. Again he fires a second barrel of 12BB. Now you really can’t call. You are still out of position, with what is now third pair, AND your opponent is firing again. You hand just doesn’t seem good enough, so you fold.
There are 2 more common situations where firing a 2nd barrel should be successful:
Your opponent raises on the button, and again you call in the BB with T9s. This time the flop is A 5 4 with 2 of your suit. Your opponent bets 4BB and you call with your flush draw. Strictly speaking you aren’t getting enough pot odds for your draw, but its possible that your opponent missed as well. If that is the case he will likely check the turn, giving you another chance to make your draw. Also you think that in the situations where your opponent actually did hit the Ace, your implied odds are enough to justify calling.
The turn comes an offsuit J and you check again. Your opponent bets 12BB. You are getting slightly better than 2-1 to call, and are only about 4-1 to hit your draw with only 1 card to come. You don’t think that the implied odds are there anymore, as your opponent would need to call a large river bet with an obvious 3 flush on the board. You decide to fold.
The other situation where a player would call a flop bet and fold to a turn bet is where they don’t have anything themselves, but they believe that its unlikely that you hit the board either. If you check the turn to them, they intend to bet and take the pot away from you. This is called a “Call Bluff” or “Floating”. It plays out like this:
Your opponent raises in mid position, and you call on the button with 45s. The flop comes J 8 2, with none of your suit. Your opponent makes a C-Bet of 4BB. You think that because your opponent is a moderately tight player, he will C-Bet often, but will rarely fire a second barrel unless he hits the flop strongly. Since this is a flop that is likely to have missed a player who plays mainly high cards, you call the flop bet. If your opponent checks the turn, you will bet yourself, with a high chance of taking down the pot.
The turn card is irrelevant, because you will fold to any bet, and bet if your opponent checks. In this case the turn comes a 9, and your opponent bets 12BB, and you muck as intended.
When should you fire a second barrel?
The best situations to look at firing a second barrel are:
1. Boards with lots of draws on the flop, none of which hit on the turn
2. Paired boards
3. Boards where the turn card could have helped you i.e. a Scare Card
4. Boards that your opponent thinks would have missed you, so they are likely to call bluff.
Boards with lots of draws on the flop, none of which hit on the turn
If a flop comes K 7 2 rainbow, and your opponent calls your C-Bet, it’s safe to assume that they are NOT calling with a draw. Therefore your opponent’s hand range is proportionately more likely to be a monster, a weak hand, or a call bluff if they are in position. If the board comes 9 T J, with 2 of a suit however, there could be all sorts of drawing hands mixed in with the possible marginal hands and monsters. If the turn comes an offsuit 2 or some other irrelevant card, firing a second barrel may be enough to get the drawing hands to fold.
Paired Boards
Paired boards are generally considered to be good bluffing flops. This is due to basic mathematics. If the board comes with cards of 3 different ranks, then there are 9 cards in the deck that could make a pair or better. A flop of A J 8 for example means that there are three Aces, three Jacks, and three 8’s left in the deck that could have paired with this flop.
On a paired board, lets say JJ8, there are only 5 cards that could have connected i.e.: the two remaining jacks, and the three remaining 8’s. The fact that paired boards are less likely to hit anyone, combined with the fact that if you DID hit the flops, you could have a big hand like trips, means that more often than not, the first to bet at a paired board will win.
The flow on effect to this however, is that good players will more often expect a bluff on a paired board, and may therefore call a C-Bet more liberally on such a flop. In position they are more likely to call as a Call Bluff, and out of position they are more likely to call with a weak pocket pair that they think might still be best. On this board I would fire a second barrel about 80% of the time against a single opponent, regardless of my position.
Boards where the turn card could have helped you i.e. a Scare Card
A Scare Card is any card that your opponent thinks could have given you a better hand. The most effective Scare Cards are usually ones that could have connected with AK. Whenever you raise, your opponents usually weight your range towards high cards, and AK is top of the list in their head. The board comes JT4 and they call a C bet, then the turn comes a Q, and you fire again, some players will fold hands as good as good as 2 pair, because they will be “certain” that you have AK and have just hit your straight.
If you make a continuation bet on a Q 6 2 board and your opponent has hit the Queen (by holding KQ or QJ for example), then you will certainly be called. If an A comes on the turn, your opponent may think that this A hit your hand. This would count as a Scare Card, and you may win the pot by firing a second barrel.
A Scare Card can also be a card that seems to fill a flush or a straight, although because your opponents will often be the ones drawing, firing a 2nd barrel when a Scare Card like that hit can be a bit more dangerous.
Boards that your opponent thinks would have missed you, so they are likely to call bluff.
This would be when you have raised pre-flop from early position, and someone has called from the button. The flop comes 2 5 8 rainbow. You C-Bet, and the button calls. The button might have a set, or an overpair, an underpair, overcards, or absolutely nothing, but he has every reason to believe that YOU also have nothing. You raised from early position, which usually means either high cards, or a big pair. The flop was extremely low, so it’s unlikely to hit you. Many players would call a C-Bet in this situation, with the intention of betting if you check, and folding if you bet. They don’t need to have much, even KQ, as overcards would usually be enough. They might hit a K or a Q, you might check the turn and they can bluff you out, or they might even have the best hand with K high. All these factors combined make a Call Bluff likely.
The turn comes another 2. If you fire a second barrel on this board, an opponent who was Call Bluffing will likely fold, as would an opponent with underpairs, overcards, and possibly some of the weak overpairs. Opponents with sets and strong overpairs will either call or raise.
If you are in position on a low flop, then there shouldn’t be anyone calling your C-Bet just with the intention of Call Bluffing, as most players will only Call Bluff in position. Therefore, if there is anyone still in the hand after you C-Bet in position, their range is more likely to be pocket pairs, other marginal to strong made hand, very strong high card hands that they think might still be best (like AK or AQ) or an obscure draw with something like 67 or 34. These hands may still fold to a 2nd barrel, but it’s less likely than when their range includes Call Bluffs.
When you should not fire a second barrel
Other boards
Firing a 2nd barrel on boards other than the ones listed above is more risky, and generally requires specific knowledge of your opponent to be effective.
Multiple opponents
The situations described above all assume that you are only facing one opponent. If you have multiple opponents, the chance that your bluff will get called multiplies. I would rarely fire a 2nd barrel into multiple opponents unless it was an extremely exceptional situation.
Firing a 2nd barrel too often
Firing a 2nd barrel is a powerful move, but one that should be used sparingly. If you fire a 2nd barrel every time your C-bet gets call, you will find your opponents catching on rather swiftly. They will be more willing to call you down with weak hands, and will also set traps for you more often. If you limit yourself to only firing a 2nd barrel in profitable situations, and mix in a solid amount of turn bets with your made or drawing hands, the move should show good results.