54 to 58 lb/bu is where most soybeans that we have ever harvest land.  What is your normal and what are they this year?  Your post makes it sound like you are down 6 lb from 60.  Is 60 really normal where you farm?  54 here would be just part of the normal range. Dock at cargil starts below 54 and is only $0.025/bu at 49 lb/bu.  

I thought that most people that are reporting good yields are based on scale weights not on bin volumes.  We don't weigh most of what we put into the bin, but we run a test on every load so we know moisture and test weight of what we have and can get a good estimate of how many pounds we have in the bin.