SouthTex, My advise when loading for the 7RM for the first time or when making drastic changes in bullets or powders is to go slow. For example my 7RM would blow primers with 68grs of H4831 and any 160gr bullet. I like IMR 7828 better than current H4831, but even with that slower burning powder 65grs and 160 Nos.Part. is maxed out, but velocity in my 26" Hart is 3050fps or so.
