I have used IMR7828, IMR4831, H4831, H1000, and Retumbo behind Nosler 160gr Accubonds. My current load is IMR4831 .5gr above Hodgdon's Max data set .010" off lands, no crimp, and CCI #250. I also load this same load with Federal mag primers, but back off to .5gr below Max. The Federal primers seem to run 100fps faster out of my 7mm