I'm partial to the Nosler 250gr Partition bullet. I load Remington brass, with CCI 250 primers, and W748 powder. The amount of powder is differant with each gun, and is something you need to work up yourself. The Nosler manual starts at 54.0 grs with 58.0 as Maximum for that powder.
I have two 350s, a Remington 600, and a Ruger M-77. They are devistating on Black Bears at close range, 15 to 30 yards.