I'm not going to be doing any holding with the red dot. 99% I run an LPVO with a BDC or mil reticle.
The 100 yard zero is solid advice. I just use 25 because it is easier to see the target and I can confirm my groups. I'll give the 100 yard zero a try the next time I am at the range with that carbine.
-Seconds Count. Misses Don't-
Sanch, are you shooting indoors?
I'm not bagging on you at all, you have to do what you have to do, but for me much of the fun of having AR's is shooting mult5iples inside 50 or metal at 100 to 200 yards. If I had to limit myself to 25 yards I'd have one AR, zeroed using a 25/100 offset target.
In other words, I feel your pain.
Adding nothing to the conversation since 2015....
Unfortunately yes, my range situation is I have relatively easy access to indoor 25 yard, and a hassle to get to an outdoor range to get to distances of 50 to 200. And the times I do make it to the outdoor range, it's generally some kind of event, where I am not able to zero but could shoot an already zeroed carbine if I wanted to.
Which is why I rarely shoot carbines anymore these days and stick to handguns.