OK, now: to clarify or confuse even further:

Section 7.3, you can shoot, but only at certain clubs designated as permissible for the purpose, and under a lot of restrictions. 7.3 pistols, and ammo suitable for same, must be stored at such a club. Correct?

Whereas 7.1, you're not allowed to shoot, but they can be kept at your home. Correct?

But then, I've also heard that 7.3 is for pistols for which ammo is commercially available, and 7.1 is for those for which ammo is not commercially available. (?)

This makes sense. But then, there's also Section 58, for obsolete calibers.

So my question is: what's the difference between Section 58, obsolete caliber, vs. Section 7.1, ammo is not commercially available?

Jim