I use winchester ballistic silvertips. pretty good expansion from my .243. just took a deer last week at 250 yards no problem.

I haven't used any full copper bullets.

I hunted elk with a guy who uses only tsx and ttsx bullets from his 338 mag.
the ttsx performed better at the closer ranges and gave better expansion. the tsx struggled at short range but excelled at the long range.

guess it just depends on what kind of hunting you are planning on. maybe have a few rounds of each ready to go.