Femtochem, do submit the AMCAS sometime in June without MCAT scores. I would say by end of June. AMCAS takes about 4-6 weeks to verify, so that will be mid-Aug. If you submit too early, you might get & have to return the secondaries right before your MCAT, & it might distract you from focusing on the MCAT. Some schools send secondaries without MCAT, some schools wait until they receive your MCAT. You should also prepare for LORs & have them ready. When you get the MCAT scores in Oct, all you need to do is send them to the schools. That's what I've been adviced from the SDNers.
P60001, I thought AMCAS still sends the app to schools without MCAT scores. I'm not sure they hold your app. Correct me if I'm wrong. Thanks.