I do the old school zero as ra2bach mentioned. Most shooters in this area want a 100 yard zero. So my zero is a little different but the mechanics are just about the same. I use a 1 1/2 blaze orange paste at 100 yard and refer scope to barrel picture. I have a periscope that fits in the chamber for my aging eyes. I would also say that zero is more or less mission/shooter specific and you can't say that one is better then the other. I'm old Corps, and now my shooting days are more of metal and paper targets so I use the old 300 yard zero(scopes and irons, red dot is at 100). But I'm sure it's not what a LEO or CQB guy would want to use.
To each his own and what gets the job done.

Stay safe gents.