Imo, any chemical energy weapon firing projectiles at sub 1,000 m/s is a bit silly in a space game. IF other values of the weapons must be addressed to make such velocities on larger cannons "balanced" so be it. What we're shooting atm are comparable to medium velocity grenades and it's just too darn silly.
Exactly, I can have a C4 cannon against a ship within 500 meters and even when LEADING the target I can SEE the projectile slowly making it's way and having the target lazily turn to the side, having SECONDS before the shot impacts.
Within 500 meters weapons should essentially almost be hitscan speeds.