Firstly I'm only interested in rules-as-written supported tactics and strategies. No creative interpretations, no GM adjudications necessary. The only exception to this is that my GM has preemptively given me the okay to use the Gunsmithing feat to craft revolvers for 2000 gp and 4 days downtime.
I'm pretty adamant about using revolvers as opposed to multi-barreled one-handed early firearms. Rapid Reload only reduces reloading to a move action for early firearms, which means reloading during a fight is even worse. The revolvers at least have a capacity of six shots versus the double pistol's two, so I can make a full-round attack with my full BAB and an off-hand attack and still have ammo left over. When you add in the fact that early firearms carry the risk of exploding due to misfires and the worse range, they just aren't a viable long-term solution. Paper Cartridges also increase the chances of a misfire, which increases the chance of an explosion (and a misfire is an automatic miss with my attack). Furthermore, you have to reload each barrel of a multi-barrel early firearm separately. I think my GM would have a problem with me using 4+ free actions to reload in a single round during a full-round attack, which is what would be necessary to make a full-round attack at 16+ BAB and an off-hand attack from TWF without being out of ammo when my next turn came up.
Multiclassing is fair game, though, and I can use anything on the D20 Pathfinder SRD. I suspect that this will lead to a dip in a class that provides sneak attack. Answers that make this suggestion should include the best levels at which to take said dips, and should compare the value of these dips to the value of True Grit (see below).
Play begins at first level and stats are obtained via 30 point buy. Prioritize DEX and WIS, dump STR and CHA. I'm thinking something like 7/18/16/14/18/5 (STR/DEX/CON/INT/WIS/CHA) after racial modifiers but I'm open to alternatives since this array leaves me with 1 remaining point that I can't spend on any of my scores. I'm also currently planning on putting 4 out of my 5 stat increases into DEX soDEX; I'll probably start with Leather Armor forbecause it has no armor check penalty, I'll have a small carrying capacity due to low STR, and it carries a max DEX bonus of +6 towhich perfectly matchmatches my eventual minimum 22 DEX score.
I'm primarily interested in feat progression. Answers suggesting dual-wielding and TWF should explain how best to reload in the heat of battle without holstering one of my guns, since even with Rapid Reload making reloading an advanced one-handed firearm a Free Action, reloading still requires one hand being free. I'm also interested in optimal Prestige Class choices.
Skill-wise, assume that I will put at least 1 point into Craft (Alchemy) and keep Perception maxed out. I'm open to suggestion for maximization on the rest of my skill points but I don't think they will contribute much if at all to my damage output except for helping to craft better guns/ammo, or investing in StealthStealth for use with sneak attacks if multiclassing.
For traits, use the default restrictionsdefault restrictions: