Missile weapons have two Weapon speeds- targeting and firing. If the weapon requires a reload speed that number will be before the targeting number.
In the Basic Rules targeting and firing are counted as one action. In the Advanced Rules they are separate actions but you can flow them together without penalty(i.e. sharing speed points). In the Design Rules they are completely separate actions, not even really related.
The modifiers for different ranges are as follows:
Point Blank(PB): +40 to- hit, +8 damage;
Short Range(SH): +0 to-hit, +0 damage;
Medium Range(MD): -20 to-hit, -2 damage;
Long Range(LG): -40 to-hit, -4 damage;
eXtra-Long Range(XL): -160 to-hit, -8 damage
Average damage at Point-Blank Range can never be more than double the maximum damage at Short Range.
The damage modifiers have already been worked into the table...