What is your COG to put the last 150 lbs on?

I would suspect that with $4 corn it is significantly less than what you will be paid for extra lbs.  
 Just have to weigh that against the possibility of the market going down or worse, one (or more) of those almost fats dying on you.  

I don’t remember if it was Carlson or someone else that always said something to the effect that big cattle = big checks.