> Existing ship mounted railguns already shoot projectiles around 3km/s. Projectiles of what mass? And with what acceleration? As I understand it, with feasibl

> Existing ship mounted railguns already shoot projectiles around 3km/s. Projectiles of what mass? And with what acceleration? As I understand it, with feasible railgun lengths the acceleration is well above the limit of human tolerance, and the projectile mass is significantly smaller than a typical payload put into LEO by conventional rockets.