Which is a better situation?

I go back and forth in my mind as to whether it is better to be in a situation (as many Law Enforcement Officers find themselves) to have unlimited supplies of ammunition, but strictly limited to what they are allowed to carry for self-defense, or the other option, which is to be, like most civilians, open to experiment and choose from the myriad calibers and high-performance self-defense ammunition out there.

It might all come down to what the mandated round is for each law enforcement agency.