I'm not sure of how your application makes use of the Core Data stack, but if you don't care about (or don't have) changes made locally on the device, I'd say the easiest way to refresh the data from the server is just what you said: wipe out the store file, re-create it and import the data from the server. However, I wouldn't do this systematically on each application launch. Make sure the user knows about it and think of providing a "refresh" button to trigger that procedure. Also make sure you can download new content from the server, before wiping out the local store.
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