Thats what I found on my old machines too, but when my mother was teaching me how to sew, she told me to never do that because it could damage the bobbin (I don't remember why of course). But there were many occasions that she would only half fill the bobbin to finish, and then she would use the remaining thread to do the hemming etc. My mom had exactly 4 bobbins for her Kenmore, and G-D help the child who lost one of them, everything stopped until that bobbin was found!