Rex has a new video up and some downloadable Excel forms for long range ballistics calculations.
Linky: http://www.youtube.com/watch?list=UUqymwlCbVwpMnSLrd-NAQJQ&v=pMat772ATLE&feature=player_detailpage
Linky: http://www.youtube.com/watch?list=UUqymwlCbVwpMnSLrd-NAQJQ&v=pMat772ATLE&feature=player_detailpage