I have a 458 B&M, you use 300 RUM brass cut it to 2.25" then run it in full length die, so the bolt closes with little resistance, its ready to shoot. Do the same with a 9.3 B&M. They look like they came from the factory, no chips or wrinkles.

Load solids with nickel brass, soft points with brass at a quick glance when WTSHTF I know what is what.