That's a tough question--there are lots of different things to do. Are you loading to the land, and varying your OAL to check for accuracy with each load? I.E.: load two rounds at 72 grs. and to 3.330" OAL, two more at 72 grs. and 3.335", and two at 72 grs. and 3.340", then switch to the same pattern using 73 grs., then more at 74 grs., etc. Always start with a lighter load for each component. My Sierra book list the accuracy load for that heavy bullet using 64.6 grs. of IMR 4350 at 2800 fps, and the hunting load using 72.1 grs. of RL22 at 2900 fps. H1000 is also good, as is H4831. It's all about the consistency of the burn. Lotsa luck.
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