Just because you CAN suspend your belief, doesn't you SHOULD have to.
Yes, there are certain movies, where it's expected - movies about monsters, aliens/alien planets, and wizards.
Revolution, doesn't seem to be working on any particular basis. There has been no mention of aliens knocking out the power (ala Falling Skies). No mention of monsters who suck the energy out of everything, or nutjob wizards who are controlling the powergrids. It's supposed to be taking place, in our universe, just a few years in the future.
This show is, bassically "For some reason, some power has stopped, but not all; some chemical reactions work, but not others; and everyone in the world, has become an imbecile, without the slightest bit of knowledge of pre-industrial age mechanics".
Do axes and rivers still work? Make paddlewheels. Does fire still work? Make steam powered devices.
I don't get the whole "bullets are precious" crap, either. Did every single person with the knowledge of gunpowder, just disappear? How about all the books written on making gunpowder? Did libraries just vanish?
Shell casing asre absolutely reusable. There are entire, non-electrical machines, dedicated to the home bullet-loading hobbyist. Get lead, melt it down, pour it into a wooden mold, pack the gunpowder and bullet into the casing, and move on. Lead, obviously isn't hard to come by - somebody is making all those musket balls.
This show is just poorly thought out.
-Fred