Man--sounds like just the project i wanna do. I'm probably gonna go with the Striker tho to have a magazine like Ray's doing. This for long range coyotes using the 75 or 80 A-Max. The 6th Hornady manual shows IMR 4895,RL-15,H 4350, H 414, VV N-160, and AA2700 for use with the 75's.
Sierra's 5th Ed. shows XMR-4350, H4350 Ext., RE-19, IMR 4831, XMR-3100, H 4831 SC, and Re-22. This with their 80 SMK.