With your bullet, I would start at 63 gr RL17 with a CCI 250 primer and work up. I would not push the velocity past 3250 fps, but that is just me.

From the Alliant website

http://www.alliantpowder.com/reload...;type=1&powderid=25&cartridge=83



300 Winchester Short Magnum Speer 150 gr BTSP
Federal 2.81 24 Fed 215 Reloder 17 69.3 3,343 -

300 Winchester Short Magnum Speer 165 gr BTSP
Federal 2.81 24 Fed 215 Reloder 17 68 3,217 -

300 Winchester Short Magnum Speer 180 gr BTSP
Federal 2.8 24 Fed 215 Reloder 17 66 3,082 -


People who choose to brew up their own storms bitch loudest about the rain.