My government loans were either 6.8 or 4.8 when i graduated, i paid off the ones with higher interest first. The ones that remained, the interest rates after a while went down either by using automatic payments or making payments for 2 years. I know there was some governemnt thing that was passed that dropped my loans to 2.something after graduating.
I really could not tell you how it happened, I know I didnt do anything special just kept paying my loans and the interst rates would decrease after a while. Sorry I can't be much of help.
Starting Score: TU-775; EQ-799; EX-766