If you enchant a gun with the Distance ability (PF phb, page 470)
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"Distance: This special ability can only be placed on a ranged weapon. A distance weapon has double the range increment of other weapons of its kind.
Moderate divination; CL 6th; Craft Magic Arms and Armor, clairaudience/clairvoyance; Price +1 bonus.
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Will this allow the first range increment to be doubled??
It sounds like it will.
Range listing on guns = listed here for reference.
""Range and Penetration: Armor, manufactured or natural, provides
little protection against the force of a bullet at short range. When
firing upon a target within a firearm’s first range increment, the attack
resolves against the target’s touch AC. At higher range increments, the
attack resolves normally (including taking the normal cumulative –2
penalty for each full-range increment). Unlike other projectile weapons,
most firearms have a maximum range of five range increments.""
Distance Pistol = now first range 40 feet
Distance Musket = now first range 80 feet
Yeah all they did was include the normal range rules with the new penetration rules for firearms.
Also Flaming Burst (+2 magic bonus) or Frost Burst (+2 magic bonus), might be great enchantments for guns. (page 470)
1d6 extra elemental damage per hit
On a Confirmed Critical + 3d10 extra damage.