I get most of my bulk powder from Weidners.
Most powder Mfg's have web sites with reloading info.
The last time I ordered bulk pistol powder was back in 1992, I ordered 8 lbs of WW231 from weidners. It lasted me 8 years. 231 goes a long way at 5.1 grains a pop.
If you talking "Pulled" powder, like the Pulled IMR4895.. use the regular IMR4895 data.
Midway USA is a good place to buy bulk 30 cal bullets, unless you'll settle for even cheaper "pulled" 30 cal, if so www.gibrass.com.