I know that you mean reloading a firearm, but I would love to see actual reloading (handloading ammunition) in a movie.
It's rare but I've seen this in movies before, and depending on how it's used, it can definitely have a place in certain stories. By the way, cleaning guns is another rare (except in
The Big Valley where it seems like half the episodes begin with one of the brothers cleaning a gun
) but occasionally useful plot or character development device (e.g. "Blondie" bonding with his revolver in
The Good, the Bad and the Ugly).
You know, the hero is one of the last people alive, struggling for survival against zombies or bad guys, the local sporting goods store ammo shelves are empty, so you see the hero sitting at home in his garage, buckets of brass all around him, pulling the handle on an old single stage press!
That's right, it can portray both the desperation of the situation as well as the resourcefulness of the hero. I think that most of the instances I've seen are in horror movies with a supernatural element, in which the protagonist sometimes needs special (e.g. silver) bullets to get the job done. I've seen a few Westerns that featured handloading cartridges and casting bullets, as well, usually for a purpose but sometimes just to evoke a different era from the perspective of the general audience.
I guess it would kill the action in a gunfight scene if the hero had to run around picking up his brass.
It could be worse--I actually saw an episode of a TV show a few years back that had a sheriff reloading his pistol in the middle of a gunfight by stuffing individual cartridges into a magazine.
He didn't even take cover while doing it.
Really, who carries one magazine and loose cartridges for an autoloader?
I mean, it was a Beretta 92FS, not a SIG P210!