"N***a imma CapPa yo ass" <--- edgy enough?

You Nocappa my ass, I nocappa yours.

Anyways... may wanna check current railgun velocities, I think we're currently redlining at around 5 km/s with single-shot building-sized guns.

Correction, 2.4 km/sec. That, and even currently railguns [url=https://en.wikipedia.org/wiki/Railgun#U.S._Navy_tests]kinda suck for their size[/url].
Talks of an '18" shell' that wieghs "11 kg" while the typical 5" naval gun acieves similar muzzle-energies with a shell possessing 3x the mass.

The fact that these 18" HVP shells can actually fit down the barrel of a Mk 45 5" gun kinda indicates [url=http://defense-update.com/wp-content/uploads/2016/05/hvp_nrl_725-1.jpg]someone measured something wrong in their tests[/url].

Current, 1km/sec bullets already leave plenty enough of a vapor-trail, if that's the aesthetic you're going for.

Assuming 22mm shell wieghs 1 kg, it's a 25 MJ gun here to get 5 km/sec (assuming no friction). Meanwhile, a WW2 era 57mm anti-tank gun does about 37.5 MJ at the muzzle for [url=https://www.youtube.com/watch?v=RURZrtES9jU]probably less mass[/url].

#killjoy of the year