Here's Miller's final big board. He details his grading system, then lists all 400. After that he breaks it down into position groupings.
http://bleacherreport.com/articles/2436440-br-nfl-draft-400-the-top-400
Grading scale:
http://bleacherreport.com/articles/2436440-br-nfl-draft-400-the-top-400
Grading scale:
Grade Label 9.00 Elite, No. 1 pick 8.00-8.99 All-Pro Potential 7.50-7.99 Pro Bowl Potential 7.00-7.49 Top-15-Player Potential 6.50-6.99 Rookie Impact/Future Starter 6.00-6.49 Rookie Impact/Future Starter 5.50-5.99 Future Starter 5.10-5.49 Quality Backup 5.01-5.09 Backup Caliber 5.00 Draftable Player Cutoff 4.75-4.99 Priority Free Agent 4.50-4.74 Camp Player 4.00-4.49 Not NFL Caliber