Thanks for the input.
wrt having spare ammo, I am using a house rule, but in the original rules, it is still possible to get spare ammo during an encounter from a comrade or a fallen foe.
I kept the 2x2 area, because a an Area burst 1 would be 3x3, which I think is too big, and therefore a bit too good.
I shortened the range of the shotgun, but didn't make it 'Close' because I wanted to leave a bit of range for using a ranged weapon, and also allow opportunity attacks since it is still considered to be a ranged attack.
wrt Area vs Close attacks and opportunity attacks, the fact that it is a ranged attack tells you that it provokes opportunity attacks, so I don't think I need to change that.
Any more comments would be welcome.
I changed the rules just a bit:
AUTOFIRE OR SPRAY ATTACK (Area) adapted from the Star Wars Saga Edition
You fill an area with a hail of gunfire. Standard action ♦ Ranged Weapon.
♦ Requirement: You must use a ranged weapon that is capable of attacking multiple targets at once.
A fully-automatic gun or a spray weapon can attack any area within its range. A shotgun can attack at a range of 2 squares.
♦ Target: All creatures in a 2x2 square area.
♦ Attack: Make one ranged basic attack roll with the weapon, at a -5 penalty, against the AC of every creature in the area.
Hit: Each creature you hit takes normal damage from the attack.
Miss: Each creature you miss takes half normal damage from the attack.
Special: If your net attack roll is less than 10, or you roll a natural 1, you do not hit any targets and they take no damage.
♦ Ammunition check: There is a 50% chance you immediately use up the ammunition in the weapon. If you get spare ammo, you can reload as a move action.
AUTOFIRE OR SPRAY ATTACK (Single Target) adapted from the Star Wars Saga Edition
You blast a target with a hail of gunfire. Standard action ♦ Ranged Weapon.
♦ Requirement: You must use a ranged weapon that is capable of attacking multiple targets at once.
A fully-automatic gun or a spray weapon can attack any target within its range. A shotgun can attack at a range of 4 squares.
♦ Target: One creature
♦ Attack: Make one ranged basic attack roll with the weapon against the target.
Hit: The creature takes 2[W] damage from the attack, plus all the usual modifiers.
Miss: The creature takes half normal damage from the attack.
Special: If your net attack roll is less than 10, or you roll a natural 1, you do not hit the target and it takes no damage.
♦ Ammunition check: There is a 25% chance you immediately use up the ammunition in the weapon. If you get spare ammo, you can reload as a move action.