Growth?

[200xth]

I am unable to get rats the size i need. All i can get are medium rats. I know rats are nutritionally better but mice are all that's available in my area

Your snake can do fine on multiple mice.

As far as I know, no study has been done on the nutritional requirements of ball pythons. Rats are preferred because they're easier, not necessarily because they are better.

Just make sure you are feeding him enough mice at once.