Huntelaar wrote:i think for the first question you change the Explosion Radius in the .tweak file
well, there are many different ways to change the "damage" of a weapon.
The most obvious one being the base damage often labled as "damage"... what we need to keep in mind is that there are several things that affect the actual damage delt when it hits something, for instance the range.
There is a variable for that as well, called something like 'damage over range' or something to that effect.
Now there are other things such as "radius" of damage/explosion, and "force" too. Force is mostly the effect on the object that gets hit. for instance if I was shooting a rifle at a jeep, the jeep wont be pushed back, but if I was fireing a tank or placed some C4 on there, it will move

thus the "force" of a tank shell is higher than a rifles, I havent tested if the force actually affects the damaged delt though.
The velocity might also have an effect on the damage, but I havent tested it.
EDIT:
here are some of the stuff that I think will alter the damage (at some level)
explosive objects:
ObjectTemplate.detonation.explosionMaterial 55
ObjectTemplate.detonation.explosionRadius 3
ObjectTemplate.detonation.explosionForce 10
ObjectTemplate.detonation.explosionDamage 200
bullet objects:
ObjectTemplate.minDamage 1
ObjectTemplate.damage 300
ObjectTemplate.distToStartLoseDamage 600 <--- that was the variable I was talking about
ObjectTemplate.distToMinDamage 1000 <-- at this range the damage will be ObjectTemplate.minDamage
common:
ObjectTemplate.velocity 400