As for the post you created explaining the gunman, is it possible that you still have a copy of the weapons rules you wrote? I would appreciate very much to balance this character. Thank you. Please, feel free to send me an email to firstname.lastname@example.org. The site you are referring to no longer has the item available.
Your main problem is that the Gunslinger is dominated by the terrible rules of the Pathfinder's weapons. It will never have damages comparable to other characters. Consider getting your DM to allow for better gun rules, there are Pathfinder Freeport Companion and the Secrets Volume of Adamant Entertainment, and here is a great set of free weapon rules (I wrote) for Pathfinder from LPJ Design to through RPGNow.