Sabot rounds are stabilized by fins, not spin. You can't have both unless your fins are what provide the spin, at the cost of a LOT of drag. What is the point of propelling your projectile at 3km/sec just to have it lose velocity for stabilization? The destructive force of a projectile depends on its kinetic energy at the point of impact and due to the potentially high velocity of a railgun-launched projectile, their destructive force may be much greater than conventionally launched projectiles of the same size. rail gun is not rifled; nor does it provide rotation in the projectile through the magnetism propelling it.
Sabot rounds are stabilized by fins, not spin. You can't have both unless your fins are what provide the spin, at the cost of a LOT of drag. What is the point of propelling your projectile at 3km/sec just to have it lose velocity for stabilization? The destructive force of a projectile depends on its kinetic energy at the point of impact and due to the potentially high velocity of a railgun-launched projectile, their destructive force may be much greater than conventionally launched projectiles of the same size. rail gun is not rifled; nor does it provide rotation in the projectile through the magnetism propelling it.