The low effort path of instant gratification of small groups for me at 100 yards is with wimpy loads and fast powder:
35 gr Vmax in 223
65 gr Vmax in 243
72 gr Vmax in 257
110 gr Vmax in 308

They may make tiny groups, but are not very useful.
Those light bullets have the ballistics of a ping pong ball.
At 500 yards, heavier boat tailed bullets work better.

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps