>>63912785
>it's just a penetrator with no propellant charge
"penetrator" are you forgetting the bursting charges of those shells? or are you talking about shots without any chemical filler...
Italians mounted a modified naval 3" auto-cannon on a tank chassis, can you do the same with a railgun (without using a freight train), good luck with the mediocre RoF because you can't add enough railguns and the magazine is full of useless shots instead of real rounds and missiles.