TM-02 Khanjali - Railgun or Stoke? (Grand Theft Auto 5)

And again good afternoon!
That railgun that is the standard gun, destroy the Rhino with four,and the avenger with five hits.
Recharge the velocity of the projectile (Wikipedia lies) are also identical.
The range of the railgun less uncharged and charged - the same (sort of) like a cannon.
This gun grips - squeezed paint,and it shoots automatically.

Is there any point in railgun?