Depends.
For match quality ammo I use a RCBS Rockchucker press, Redding Competition dies, and a RCBS Chargemaster powder measure. Add the tumbler, gauges, caliper, trimmer, Autoprime, etc. and it's a fairly involved process that gives me sub-MOA groups with match bullets (Sierra Matchking) and extruded powder (.308 = IMR/H4895, or Varget, 300WM = H4350).
For "range fodder" (5.56 and 7.62 only) I use a Dillon 550, RCBS or Dillon dies, the aforementioned QC tools and ball powder, usually W748 or BL-C(2). Depending on the quality of the projectile, I can still get easy MOA ammo.
I use both presses because it affords flexibility for testing and small batch while preserving production rates for volume shooting. I do have a significant investment; however, I've been accumulating it over 35 years (the stuff doesn't wear out!).
To start for rifle, I recommend the Rockchucker Supreme kit, probably from Natchez Shooters Supply; they always seem to have the best prices. Truthfully, any of the cast iron "O" frame presses will do the same thing. Stick with Redding dies for match ammo though.
If you want to do rifle and pistol "training ammo", get the Dillon and use Dillon dies. If you don't mind ball powder, it is also capable of producing excellent ammo. I just have my preferences and they work well for me.
HTH