As others have noted, Federal Gold Metal Match tends to be a favorite.

The 168s are good out to 800 yards or so, 175s a bit farther, but some guns like one better than the other at moderate range - so you need to test.

I shoot PPU 168s often, but they generally do not deliver the same accuracy as the GMM.

Some have worked up loads with Lapua Scenar 155s that do very well at max range, but some rifles with 1:10 twist don't care for them.