My most accurate loads were with IMR 4831. The 200 grain had a light load that would shoot cloverleafs all day. As I increased the charge, the group opened up until I got the load hot. It then closed right up again. I had to load heavy for the 225 grain, the 250 grain and the 275 grain Speer. I won't post my charges, as I don't want to be responsible for any mishaps. Velocity was high, recoil outragous, and terminal performance outstanding.