Tales of Lorakain
All Firearms share proficancy slots with Crossbows. As such, they use the Crossbow Expertise feat and Weapon Focus Crossbow feat and any other feat that gives a benefit for cross bows. The specific type of crossbow they share proficency with is included in the specific fire arm description
As a relatively new invention, firearms may not be enchanted. However you automatically use the Inherant bonuses with them even though the campaign does not use them normally.
Load Movement: You must sacrifice your move action to reload the weapon. As normal, attack powers that allow for more then 1 shot assume the reload in the power.
Use the price and weight for Sling Bullets. This also includes the cost of the powder to go with the shot.
Use the price and weight for a waterskin. Each powder horn can hold enough powder for 40 shots