An odd view since the Earth of 2005 can design and build 500 megaton devices.....rather odd that people 400 years from now could not.
Maybe it's just me, but that sounded like a whiny Trekkie talking there. If they have never demonstrated the ability to use 500 megaton missiles, we shouldn't assume they can. We should simply measure the yield that they do have, such as needing hundreds to fragment a 10km hollowed-out asteroid.
How do you get through Tungsten or Uranium Armor....with Tungsten or Uranium projectiles.....same goes for "durasteel" or whatever you call it!
Well, in this case trying to use Plastisteel bullets to penetrate Plastisteel stormtrooper armor wouldn't work- although it is extremely strong, it has relatively low density (which is why people don't move around like they are wearing steel plates while wearing it) so it would take a whole lot of velocity in order for it to penetrate (which is why they simply use blasters).
Shield are wank tech and cannot be analyzed rationally.
What do you mean? We can quantify the results of impacts of them, their energy dissipation capacity, and many more things. Even if we don't understand the mechanism, we can understand the effects.