asciilifeform: actually it is because of the Hochdruckpumpe problem (ain't no barrel thick enough for icbm 'bullet') but also limit on g-force for complicated mechanism like nuke.
asciilifeform: ;;later tell mircea_popescu http://btcbase.org/log/2016-07-13#1502353 << efficiency has 0 to do with it! calculate, for lulz, the efficiency of making gunpowder and then launching a projectile with it. (it is in single-digit %, at best.) big fat whoop that the gunpowder-making happens on land. the real reason for railgun is illustrated by the failure of the german Hochdruckpumpe cannon.☝︎
