Calc Borderlands - Moonshot canon

I've been looking for a way to calc the moon-shot blitz for ages, but could never find the mass of the LOADERS. Finally, I have something.
20:00
A car is fired from the Hyperion moon-shot cannon and lands on Pandora in seconds. Luckily, we have an official distance from Elpis to Pandora in The Worlds of Borderlands!
The distance from Pandora to Elpis is 87,000 miles (or 140012.928km). Now for our timeframe...
Timeframe is 21 seconds and 6 frames (with a framerate of 24 frames per second).

T = 1s/24
= 41.6666667ms X 6
= 0.25s + 20
= 20.25s

A quick search reveals that an average car weighs 4079 pounds, or 1850.203kg.

T = 140012.928km/20.25s
= 6914218.67/299792458 X 100
= 2.30633509% C

Enter that through the relativistic kinetic energy calculator and we have 3.475E+18 joules, or 10.573613766730401764 megatons.

Final Results
Hyperion moonshot blitz (speed) = 2.306% C
Hyperion moonshot fires a car = 10.574 megatons

Scales to LOADERS and CONSTRUCTORS, who survive these shots with no shielding unscathed (aCONSTRUCTOR would weigh even more than a car), and from them to the Vault Hunters.