I have just been testing this mod as well and have to say: Very well done. Works quite fine. I only have some small comments. Not really bugs, but more like balancing and gameplay issues:
Why do you actually need a powder flask and ammo pouch? You need to have them and have them equiped. But since you already get them at the beginning of the game, it's not really hard to come by these items. So I'd think it might be a good idea to either remove them again (it's just annoying to have to equip two additional items that don't really do much once you have them) or make add something that makes them nescessary.
About every single character has got a powder flask and ammo pouch (even if they don't have a gun, bullets and powder). After going into the Oxbay dungeons once, I emerged with about 30 of them, while you need only one. I sold them all to a trader and made a few thousand gold pieces profit. So the powder flask and ammo pouch are great ways of making much money in a real short time.
Traders don't seem to sell ammo and powder. I could only get it from looting enemy characters. But I got quite a lot of it still. I don't think that, as the mod currently stands, you would run out of ammo if you keep looting enemies. You get quite enough bullets. Now if enemies would only have one or two bullets, that would be enough for them (enemies don't usually shoot more than twice during a fight, do they?), but would make sure that they won't have much left when you loot them. So then you might actually run out of ammo and powder.
So I'm suggesting the following changes:
1) Try to fix some powder flask and ammo pouch gameplay issues. You could remove them from the game completely, give them no or little economic value (so you won't make so much money from them) or make it so that you can't loot them from enemies. Maybe you could think of some other things as well. I'm just randomly coming up with ideas.
2) Make enemies carry about 1 or 2 bullets. That would be enough for them, but not for you. <img src="http://www.piratesahoy.com/forum/style_emoticons/<#EMO_DIR#>/icon_mrgreen1.gif" style="vertical-align:middle" emoid="

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3) Have the traders sell a few bullets and a bit of powder as well, but not too much.
I hope you will take this as the constructive criticism it is meant to be. I reckon, once you get these issues sorted out, you have made a really excellent mod that can safely be added to the post Build 12 modpack. After all, this mod doesn't seem to come with serious game-killing bugs. And I really like this mod and would hate to leave it out. <img src="http://www.piratesahoy.com/forum/style_emoticons/<#EMO_DIR#>/whistling.gif" style="vertical-align:middle" emoid="

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