Is this correct?
It seems very strange to me that the weapon range does mark a range band boundary, that the weapon's "effective" range is in fact twice it's nominal range.
Effective range is a little more than just "how easily is it for me to hit a target", especially considering the firer's experience and abilities. Using the same weapon an olympic marksman is going to be able to hit targets much further away than a guy whose never fired a gun before. The ranges listed are therefore the effective ranges of the weapon itself, how far the weapon still has a chance to hit a target.
If you are thinking, why is there a maximum range consider, if you let players shoot infinite range you'd have guys dying from submachine gun hits at 2 miles out… There is also ballistic energy to consider, eventually a bullet just won't have enough speed to be a threat to anything. For a projectice like a Bolt round which is thick but short and fired out of a short barreled weapon, once the sustainer motor dies the bolt is going to drastically bleed off its velocity. Then there is actual accuracy, some guns just aren't accurate to hit targets past certain ranges, no matter how well you aim.
The US military determines effective ranges based upon a weapons ability to reliably hit a target of a certain size ballistically.
The M-16 can engage a point target, which is a human sized target, out to 550 meters
It can hit an area target, which is a large group of human targets, out to 800 meters
The maximum range an M-16 bullet travels after being fired from an M-16 is 3,600 meters
But even the best marksman is unlikely to hit a point target past 550 meters, this is because at that range the bullet fired has a greater chance to miss than hit even if zeroed, perfectly aimed, and mechanically fired.
Effective range is unchanged, even in a vaccuum. With no resistance the bullet will continue to go off into infinity, but the weapons accuracy still means it has a greater chance to miss than hit past it's effective range.
Even if a weapon can shoot farther than it's effective range this doesn't mean you have an ice cube's chance in hell of hitting something that far away. And just because a shooter lacks the skill to shoot targets at longer ranges doesn't mean the weapon isn't effective at long reange. I think, with a few exceptions, FFG did very well concerning weapon ranges.