Here are the two exercise videos I prepared for developing right hand speed. I think it is especially useful for bass players who play thrash and death metal. The videos starts from 80 bpm and go all the way up to 240 bpm. Enjoy!
Exercise for 16th notes http://youtu.be/MFT-k-U1Yic
Exercise for Galloping http://youtu.be/TuR6XGXgHLM