It kind-of depends on what your application is.
For a mid-range optic we prefer a 50 yard or 200 yard zero. They have nearly identical flight paths, so if you are constricted on range space, you can go for a 50 yard POA/POI. If you have 200 yards available achieve POA/POI there, as it will give you a true zero at range. It will only drop about 5 inches at 275, for 300 just hold at the shoulders.
You can also go with the old 300 yard zero concept, but I am hearing that a lot of people are having a tough time finding ranges that will support. I do not recommend the 36(ish) yard field expedient zero unless you can confirm at 300. This gives a slightly high trajectory, rising about 5.5 inches above LOS at midrange.
Some like a 100 yards zero, but only for dedicated CQB guns. This gives a laser-flat trajectory out to 200 yards, but is pretty rough if you get past 250.