2 questions in one go.
1: Do the Musket Master's free Rapid Reload (musket) feat also cover double-barrel muskets, axe muskets and hammer muskets?
2: I see that DB muskets have a listed range of 10 feet, vs the 40 feet of regular muskets. DB pistols do not lose range in this fashion, it is intentional or just a typo? And if it's a typo, is there an errata or something available?