Max number of "Add Choices" in a DVC step?

Hi,

So I'm creating a data normalization campaign for leads in our database to change state/province fields from abbreviations to the full state/prov name so they can be synced to SFDC.

Does anyone know the maximum number of "Add choice" options I can use in a Data Value Change, before it either doesn't work or is too taxing on the system and does something bad?

With my state/prov pick-list, there's 63, and it looks like I've been able to add all 63 add choice fields, but when I started choosing "state" from the if/attributes, it takes a few moments before it selects. If this isn't a great idea, wanted to check if there was another more efficient way to do this? Maybe split into a group of campaigns?

Thanks!