Be a Pistolero, take two weapon fight, two double pistols, and rapid shot (and pre-reqs). At 11th level take signature deed (or w/e it's called) and place it on the bonus deed you got from becoming a pistolero. You'll also need rapid reload and alot of alchemic rounds.

Using the double pistols special each shot can shoot 2 bullets, since it's now a free action to reload and you only need to possess 1 grit point in order to perform the deed given to you at first level.

You can fire 3 times a round off of your normal attacks + 1 from 2 weapon fight + 1 from rapid shot which = 5 shots. Each shot is shooting 2 bullets so 10 shots a round. Say you miss with every shot 10 * 3d6 / 2 on average = 45 damage a round WHEN YOU MISS ALL OF YOUR TOUCH ATTACK SHOTS. :P Have fun.

Your main problem is that the Gunslinger is gimped by the awful Pathfinder gun rules. It will never have comparable damage to other characters. Consider getting your DM to allow better firearm rules, they exist for example in the Pathfinder Freeport Companion and Adamant Entertainment's Tome of Secrets.

Here's a set of gun rules I wrote for Pathfinder from the Geek Related blog. We've used them in a naval/pirate campaign for 6 years now and they've served us well; we have a cleric of Gozreh whose primary weaponry is guns. He carries a batch of them to offset the long reload. He has some trouble hitting things, but that's largely because he's just a L8 cleric with a modest DEX. These rules were published in a free supplement by LPJ Games that's gone missing from RPGNow.

My rules basically:

• Use flat-footed AC not touch AC, because no other physical attacks ignore armor. If an ancestral rune encrusted +5 sword has to contend with your enchanted armor, so should bullets. Otherwise you can have all the super magic adamantine armor you want and it is zero worth against chunks of lead. Making specific nondamaging attacks touch is fine but shooting someone and hitting them to do damage is never a touch attack by core d20 ruleset theory.
• Use high damage - 2d4 for a pistol, 2d8 for a musket, x3 crit, with "exploding" damage dice (reroll max damage dice and add to it)
• Have slow reload (2 full round actions, Rapid Reload takes it to one), require Exotic Weapon Proficiency

By making guns have a big punch but not able to be fired multiple times a round, you get both greater realism vis-a-vis historical firearms ("I shot a flintlock 3 times last round whee" - really?) but you also get good burst damage output.

Then I've had some special firearms appear - Azlanti railguns, a magical powder horn that can be used to shoot underwater... Works out well for my group.

Guns aren't bad weapons with the base rules, they just seem to require a different kind of investment, like different magical bonuses and special magic items on the side...

Guns are expensive

Being a gunslinger allows you to craft your own weapons for half the price of the weapon. Since you mentioned wanting to use a revolver, it would cost you 2000 gp, as well as 4 days work. This can be compared to a fighter acquiring a suit of full plate armor (1500gp). It's a serious investment, but not one significantly higher than what other party members can expect to pay for their gear.

However, you are going to use those guns in a way that allows you to ignore armor modifiers to AC (within 5 range increments for a revolver, as its an advanced firearm). Ignoring armor is a bonus not unlike that of a brilliant energy weapon, which is a +4 bonus equivalent for a magic weapon.

In the end, as equipment goes, a gun is on the expensive side, but its main quality (ignores armor) is worth a lot more than what you're paying for. It's basically a rip-off!

Ammo is expensive

Is it? The munição abundante spell allows, for 1 minute per caster level, to replenish any ammo taken from a container, such as a quiver or a pouch. According to item creation rules, crafting a bullet pouch that refilled itself every time you took ammo out of it (use-activated) isn't so expensive :

• 2000 gp base price (2000 x spell level 1 x caster level 1)
• 100 gp for material components (unlimited charges costs the equivalent of 100 charges, which means 100 bullets worth 1 gp each)

Although the craft wondrous item feat has a pre-requisite of caster level 3rd, the craftsman can elect to cast the spells required for the item at a lower caster level, thus reducing the total cost of the item (included in the above estimate). If your wizard friend has the craft wondrous item feat, he can halve these costs, as you only need to supply him with the base materials. Alternatively, having the bullet pouch cast abundant ammunition on itself for 1 minute upon speaking a command word would reduce the cost slightly (1800 gp base price instead of 2000 gp).

As far as magic items go, this one is pretty cheap considering you'll never have to worry about ammo again! As a precaution, however, I'd recommend buying the spell fabricar balas for your wizard friend to learn. That way, if you ever misplace your magic bullet pouch, you can still have him create 30 bullets per casting, providing you can find 2 gp worth of metal...

Guns don't add ability bonuses

At level 5, a gunslinger gains the gun training ability, which allows you to add your DEX modifier to the damage roll of one type of firearm. By definition, "pistols" should include revolvers. This is even better than bows, as you only need one single stat to do everything!

I guess that's it for this point: guns do apply ability modifiers to dmg rolls, at least for gunslingers of level 5 and above.

How to keep up with the damage output of other classes?

• Get dexterity augmenting items: Your damage and chance to hit are both dependent on your dexterity. Boosting this stat should be your priority. As a bonus, your AC also goes up!
• Prioritize elemental weapons over higher bonuses: You already ignore armor to hit, meaning you'll hit more often than your friends. Instead of going from a +1 gun to a +2 gun, opt for options like flaming, frost or lightning, which all add 1d6 to your damage. Alternatively, if your campaign is heavily thematic and you encounter mostly one type of enemies, bane becomes a very strong property.
• Use o clustered shots façanha: This feat allow you to add the damage of all your shots before applying enemy damage reductions. This will allow your gun damage to stay relevant on higher end monsters. This also allows you to cheese the massive damage optional rule if your GM uses it.
• Use o deadly aim façanha: This one is a matter of preference. Deadly aim is like the power attack feat for ranged weapons. However, the firearms rules state that using the deadly aim feat is not a touch attack even if within the proper range. (This means you still hit against touch AC and gain the benefit of deadly aim) If you can deal with that (you do have high DEX and the best BAB available, after all), it's potentially great damage.
• Get more attacks: By dual-wielding pistols, you can get up to 8 attacks with the proper feats (4 base attacks, 3 for the dual-wielding feats, 1 for rapid shot).

After 2 rounds, my guns are empty! How do I reload fast enough to keep going?

No mundo real, speed loaders exist. These devices allow you to load 6 bullets in a revolver simultaneously. You have to pre-load them with bullets, however. But... They're some sort of container, then... or do they not hold 6 bullets? If you can create a bullet pouch that refills infinitely, why not a speed loader? Note that you'll need 2 such speed loaders to recharge 2 pistols, as they can only refill once at the start of each round. With the rapid reload feat, a speed loader should allow you to reload a pistol as a free action, if your GM allows it.

I may be a bit late with this, but one thing to keep in mind if you play in the normal Pathfinder setting (Golarion). If you've got your eyes on a revolver, your DM may be more stringent with their availability - just because they're on the equipment tables doesn't mean you'll be able to find one.

The finalised gun rules* mention different stages of firearm availability and Golarion defaults to "Emerging Guns", meaning revolvers and other Advanced Firearms are muito rare:

Firearms become more common. They are mass-produced by small guilds, lone gunsmiths, dwarven clans, or maybe even a nation or two—the secret is slipping out, and the occasional rare adventurer uses guns. The baseline Gunslinger rules and the prices for ammunition given in this chapter are for this type of campaign. Early firearms are available, but are relatively rare. Adventurers who want to use guns must take the Gunsmithing feat just to make them feasible weapons. Advanced firearms may exist, but only as rare and wondrous items—the stuff of high-level treasure troves.

Basically; it's entirely up to the DM where, when and how you get a revolver if you're using the normal Pathfinder setting as-is.

If this doesn't apply to your question, then just ignore it - but maybe it'll help anyone else who finds this page through Google.

*Found here: http://www.d20pfsrd.com/equipment---final/firearms

The answer to your cost-per-shot problem is buried in the starting Feats for Gunslingers.

Gunslingers start with Gunsmithing Feat. The Gunsmithing Feat allows you to (among other things):

"Crafting Ammunition: You can craft bullets, pellets, and black powder for a cost in raw materials equal to 10% of the price. If you have at least 1 rank in Craft (alchemy), you can craft alchemical cartridges for a cost in raw materials equal to half the price of the cartridge. At your GM's discretion, you can craft metal cartridges for a cost in raw materials equal to half the cost of the cartridge. Crafting bullets, black powder, or cartridges takes 1 day of work for every 1,000 gp of ammunition (minimum 1 day)."

So there you go. Gunslingers make their own ammo for 10% of the listed cost.

O double pistol. It is a standard action to load each barrel of the gun, or a move action if your character has Rapid Reload for the specific gun (p. 136, Ultimate Combat).

The Gunslinger gains a massive damage boost at level 5 when you gain Gun Training, adding you Dex to damage, and as you are using a ranged weapon, and Dex is one of the biggest boosts to your AC, it is a huge damage bonus.

Your damage per hit might not be the highest in the party, but you are the most likely to hit of any member in the party, meaning your damage is likely to be the most consistent, and the highest on average. The only way to keep your damage on par and increasing at the same rate as your other party member is to have advanced firearms paired with rapid reload, so you can pump out the maximum amount of ammo. The Pistolero deed Up Close and Deadly also helps, especially when paired with Two-Weapon Fighting, Rapid Shot or Snap Shot feats.

The Gunslinger is not designed to be the highest damage-dealer, as they gain other abilities such as Nimble and Deeds, along with having more skills than a fighter. So, they are better understood as a cross between Fighter and Rogue.

Deadly Aim and Point Blank Shot combined with Rapid Shot offer the best boosts to damage. In my opinion, there is nothing wrong with the Paizo firearm rules. A misfire is easily resolved by a Gunslinger.

From my experience, gunslingers are just not going to end up doing as much damage as other combat focused characters. Damage isn't everything though and they are quite powerful in their own way. Being able to deal damage vs touch AC with a weapon is incredibly powerful.

A fighter has the best BAB you can get because it needs it. He needs to be able to beat that 30+ AC from monsters once he reaches higher levels or he can't deal damage and he may still only hit 2-3 times with his 4-5 attacks (hasted.)

A wizard has the worse BAB progression and can still only fire off 2 rays that hit touch AC a round (with a swift cast from metamagic.)

A gunslinger has the best BAB you can get. With haste you can attack 5 times. Add all the two-weapon fighting feats and you get 8 attacks. If you're using revolvers, and getting full attacks off every round, you are hitting for 8-64 damage with no bonuses from magic whatsoever and you're probably hitting 7-8 times because touch AC is not hard to beat when you are adding double digit bonuses to every attack.

You may not hit hard, but you will most certainly be dealing damage. The longer combat goes on, the more you'll balance out with the rest of the party if not surpass them.

Dont go for number of shots instead go for vital strike and its variants. It will make each shot more damaging and all for the price of one shot instead of multiple. Also go for improved critical if viable and devastating strike to add just a touch more. Also one of the gunslinger abilities adds your dex to damage plus a small amount of extra. That's what I did with my Gunslinger and he keeps up with the fighter most of the time while taking less damage most of the time.

I've played a lot of gunslingers, and they usually end up being the primary damage dealers for the party (until the fighter starts going up his vital feat chain more). First trick is to pick a style and it's corresponding archetype...not as required as one might think, but if you're trying to etch out as much damage as you can, either going Musket Master (for the fast reloading, allowing you to multi-hit with a 1d12 musket with full attacks) or Pistolero (for up-close-and-deadly deed).

The second bit is to pick your weapons well...Musket Master gives you the Musket, Blunderbuss, Rifle, and Shotgun...plus their double-barrel variants where appropriate. For Pistols, you've got the single and double barrels, the revolver, and if your DM is fun, sawn-off-shotguns (which are awesome, though currently homebrew only...so we'll ignore that for now).

Now, remember the double-barrels because they are important. Most double-barrel firearms have the option to fire both barrels with each attack, allowing you to double your damage output per a hit. A 1d8 pistol becomes 2d8...a double barrel shotgun loaded with solid slugs does 4d8. Now, you might be saying to yourself: But that's a -4 penalty...and using bullets in your scatter weapon, that's another -2/4....true...and if you were making normal attacks, that would be a problem. Especially once you start throwing in Deadly Aim, Rapid Shot, Called Shots...etc.

And this comes in the third thing to remember: Your range. If you're a musket master, you're at your best at 30ft typically. Point Blank Shot kicks in. If you're a pistoleer, this is 20ft (10-15 if you're using dragon pistols). Stay in this range as much as possible...not only for PBS...but also to keep your attacks against Touch AC.

Because you're not having to punch through armour, shields, Natural armour, etc, you can typically afford to allow for those penalties to accumulate. There is a point where the pens can get aggregiaous, but it's typically situational at which point this occurs.

Example. I'm a level 5 Musket Master (18 DEX) with a Masterwork Double-barrel Musket. I'm making my attack at +4/+4 ranged touch, do to Rapid Shot, Deadly Aim, and firing both barrels at once. Each of those attacks are worth 2d12+9...or 2d12+18 (depends on how your DM reads the rules...but either way, it's a pretty brutal). If you crit, that's 8d12+36/72. That +4/+4 might be a problem, if i

Eventually, throw on feats like Clustered Shots (count all of your attacks as a single attack for purposes of DR, allowing you to bloow

I don't know if this is exactly completely RAW but this is what I did. Get the biggest gun you can, most damage as possible. Every last bit is important. There's a feat in PF that lets you double, triple, then quadruple your damage with each shot. Vital shot it was called and its improved versions. Then you enchant your gun to have double crit range, take a feat to increase crit range and all that. You should be able to get it to 10-20 crit range. Then what you do is do the sniper shot where you roll all your attacks into one shot. If one is a crit they're all basically crits. So what happens is your attack is equivalent to 4 shots, it crits for 16 times damage, then with your feats its around 64 times damage. On a 1d8 pistol that's 64-512 damage.

Edit: There's also a god-touched template that doubles crit rate with all weapons so its possible to get 10-20 crit rate. But other than that, yeah, I doubted that was okay but still. I tried. :P

You should have a high DEX-Bonus because you can rise your damage by adding DEX directly (on Level 5) or by reducing your attack roll to increase your damage roll (double Barrel or 2 weapons Shooting simultaneously or feats)

I'm still Level 4 and I got the feat for -1 on attack rolls, +2 on damage rolls, rising every 4 BAB by -1/+2 on this Level, using a musket and dealing 1d10+4 or next Level 1d10+8 damage by adding the Dex-bonus with gun Training
for a normal sized char that would be 1d12+8, if you use a double-Barrel-weapon u get a second dice, for more damage u should get the feat for faster reload, this should be some damage.

And again, Level 7 you get dead shot, asking your GM he may allows you to make a double Barrel shot with both Barrels as a "single attack" for this, giving you 2 additional dices for every additional attack you could do with your BAB, on Level 7 that would be 4d of your weapon, the bigger the weapon the more damage.

If that's not much damage for a touch-attack if u stay in range, then I need references for the damage you want to deal because compared to the last 3 parties I have played or seen this is above average, even the berserk had more, but not much more.

Now comes something which you haven't exactly asked for, but may be also useful. Gunslinger is a class which got also some stats useful if the party lacks a rogue/ranger, with his need of wisdom and dexterity he can use nearly every skill which is important for both of this classes.

Also Gunslinger doesn't Change much for damage calculation if you use small or normal sized classes if you reach Level 5, because the damage step reduces the damage by 1-2 but the static damage rises by 1 for DEX-Bonus all small races I can remember have, so its one of the best Options for damage with small classes.

Using other feats for stealth or similar things, it's nothing special to get a +15 bonus on stealth if you think he should be a bit sneaky to get into a good shooting position (maybe the roof of a near building), if it is a small race, and even normal sized can get a +10 bonus or something close to that very early.

Additionally if you've just got an average chain skirt made of mithril you easily achieve an AC of 20 or even more on low levels without slowing you down in any way (my Kobold Level 4 got 24), which is huge compared to most characters in not-heavy-armor.

It's very important because a gunslinger is a ranged fighter, but he still stays at close range to get the best use with his weapon, so he sometimes gets caught in melee fights.

Better watch the whole pack instead of a single part.
The gunslinger is one of the few classes which get a really decent damage even with a terrible strength, beside magic users, crossbow users and the first hit of a stealthy thief.

Who uses a crossbow as main weapon? No one, it has no style.

And thieves get only a first hit with this damage (maybe with some feats a second one, I'm not sure) IF he is able to sneak.

So only magic users are left and they've got very limited uses of spells.