Like others have posted, I don't think you can safely get 3000 fps with a 260 grain bullet from a standard .375 H&H.

The best that I've got from my 26" barreled .375 RUM is 3043 fps with 270 grain TSX bullets and 2898 fps with 300 grain Partitions.

SAVE 200 ELK, KILL A WOLF

NRA Endowment Life Member