It's likely that the more expensive ammo is more consistent.

Handloading can let you find what your particular rifle shoots best. To find the load you have to invest in the equipment (modest cost) and the time to learn how to load and then the time to experiment with the variables involved. (there are potentially lots of variables.)

I've loaded thousands of rounds of pistol ammo and saved $$ but I found learning rifle ammo loading and the necessary experiments to be tedious and so I really haven't completed them. Milsurp ammo is "good enough" for my rifle shooting. (I'm not a hunter though)

Reloading is interesting though so as a skill or knowlege item it could be another thing to add to your list of capabilities.