BIAB session, small batch to check efficiency...per BF, pre-boil conversion (1.045) 88.9% and O.G. (1.055) 87.3% - F.G. 1.005 - NB calc notes ABV @ 6.5%
Based on boiling 5.00 gallonsliters at 1.045 for 60 minutes, this will decrease your wort by 1.00 gallonsliters, bringing your after boil OG to 1.054. You wanted an OG of 1.055. It looks like it will be under.