The only components restricted in a similar fashion are primers and the powder. 1000 of the former and 4 kg of the latter. So even if you had all of that and hundreds of bullets and cases, you couldn't, in theory, make up and store more than 100!!
We have the same BS here, except not so bad. 200 rounds and / or 2000 primers (per firearm) if you're not a sportsman, unlimited if you are. 2.4 kilos of powder, no matter what.
I'm tempted to get a 50 BMG, so that I can store my powder in made-up rounds. Will just have to keep track of which cartridge is full of what kind of powder.