grains and water ready the night before. Got home from work at 4:30. Water and grains in the mash by 4:50.
Based on boiling 5.20 gallonsliters at 1.046 for 60 minutes, this will decrease your wort by 1.00 gallonsliters, bringing your after boil OG to 1.055. You wanted an OG of 1.057. It looks like it will be under.