Long War 2 Liberation Mission #5 of 5 - Assault Advent HQ / Headquarters (XCOM 2 LW2) 

That was from an edit to the game's configuration files. I just did not find the default setting for rocket scatter to be enjoyable at all, so I turned it down one "notch". Search for XComLW_SoldierSkill.ini in your Long War 2 / Xcom 2 install config files. search XComLW_SoldierSkill.ini for +SCATTER_REDUCTION_MODIFIERS[0]= and change it from -2 to -4. The result is if your soldier has decent aim, hasn't moved yet this turn, and you have taken the fire in the hole skill, there will be 0 scatter instead of what would normally be 2 tile scatter. (It's been a while so this is from memory and a short note I wrote to myself). If the soldier has very bad aim or moves before shooting, or doesn't have that perk, there will still be scatter. I believe you could change it to something like -8 if you wanted to eliminate scatter completely for soldier's with that rocket accuracy skill.