Shoot T7, a White will shoot just about anything extremely well.

I have an old White Lightening in 504, weighs a whopping 6+ pounds you can fabricate many loads for it that are really comfortable to shoot or you can load up those big heavy conicals and push them out also.

During our ML season I shoot a 460 grain Bull Shop from the rifle with 90 grains of T7-3f then during rifle deer season I shoot a 40x200 Bloodline - it all works in a White.