Switzerland banned reservists from storing issued ammo for their assault rifle at home 15 years ago.
However, this only applies to issued ammo (and IIRC the identical govt-subsidized stuff you buy at the range). You can still store your own ammo just fine. Most of those in US who saw that story didn't understand this distinction and believed that it applies to all ammo storage at home. Which is how we got all those memes about Swiss being "heavily regulated" in that regard unlike US.
However, this only applies to issued ammo (and IIRC the identical govt-subsidized stuff you buy at the range). You can still store your own ammo just fine. Most of those in US who saw that story didn't understand this distinction and believed that it applies to all ammo storage at home. Which is how we got all those memes about Swiss being "heavily regulated" in that regard unlike US.