I hear what you are saying, but I prefer a 100yd zero because its immune to temperature swings affecting the zero, and we get some significant swings in Colorado. I don't want to get it zero'd at 65 and go shooting the next morning and and its quite a bit colder and have to deal with a zero shift from muzzle velocity changes. The benefits of this have been enumerated by many more skilled than me. Again it comes back to preferences, yours will be different from mine, I'm trying to see what uses I can put this scope to good use on with regard to my preferences.
It may not be the best choice for ELR, that's fine, I may stick it on my own tactical match gun, but I don't know till I ask, that's what I'm doing. Wasn't trying to be a dick earlier but its been a long day and I was looking for some answers to questions I had not the whole "just use a 600yd zero" approach. I know I can, I'm just trying to see if its necessary.