I use there recruiting info alot from Scouts or Rivals. Usually has there 40 time and some strength numbers along with there overall rating. Like said above, where they are on the depth chart can give you a good idea of there ratings too.Also the schools website usally has good write ups on each guy. With that this is usually what I come up with for Fr/RFr,
5 Stars - 78-82 rating
4 Stars 75-78
3 Stars 70-75
2 Stars 65-70
1 Star 60-65