I have had very good luck with 748 and 223/5.56 with the 55-64gr PowerPoint bullets and with 60GR nosler polymer tip bullets.

For heavier bullets, I use either TAC if I want to use a ball powder or Re-15 if going stick. Remington 7 1/2 primers when I can find them.

75gr Hornady OTM is also a very good bullet.