+1 for Q-Man.
Buy 55gr FMJ bullets in bulk from MidwayUsa.com, PowerValleyInc.com or one of the there
other mail order companies. Prices vary.
Like Q-Man said, use surplus powder and spend some time working a good load using a
chronograph. NatchezSS.com, GiBrass.com or Wideners.com are good places to look for suplus
powders. WCC844 is what the gubmint uses for military ammo. Stock up while you can since the prices are increasing.
Also, I use the RCBS X-Die which limits brass expansion. You trim once to minimum dimensions,
champher, deburr, re-size and no more trimming. Just full length resize on subsequent loads.
I process the brass using a separate step so my decap/resizing station is empty when I prime, dump powder, seat bullet and crimp. I had problems with the 550 when using all 4 stations. It's my speculation that some of the ball powder I was using, stuck to the powder funnel which lead to inconsistent powder charges.
Good Luck!
My $0.02 worth,
Spambo