While not my first choice in a bdc reticle i have a few of them and they do work. The circles are smaller than most here seem to think they are. They are less than 2 moa across. They simply give you more aiming points for longer shots and they work well. But I do prefer a hash mark reticle like the burris ballistic plex. the original. Still the best of you ask me
2 moa circles will work for a moose, even up to 500 yards, so yes there are usages where the reticle is perfectly capable.
But most people aren't shooting at targets that large at those distances.
I'll keep my numbers here rounded off to simplify things:
For example, if the main crosshair is zeroed at 200yrds that would mean that the first bdc circle would be 2 moa @ 300yrds or 6 inches.
The second bdc circle would be 2 moa @ 400yrds or 8 inches.
The third bdc circle would be 2 moa @ 500yrds or 10 inches.
And so on...
If using the circles you end up with a 6" space at 300yrds where there is NO definitive aiming point. That allows for a 6" margin for error. That's plenty small enough for a moose, just about right for a coyote and essentially useless for precision shooting.
Bring that out to 500yrds and that margin for error increases to 10". Still useable for a moose albeit just barely, and totally useless for anything smaller.
My point is that my gripe with this reticle is that it's NOT a good reticle for precision shooting, whether it be on paper or in the field.
If you were to use the top and bottom lines of the circles for aiming points you would be much farther ahead to get a scope with a very simple MOA (or MIL) reticle. Every intersection on the reticle is the same distance apart making quick mental calculations EASY. Know your bullet drop in moa at various distances, hold over at the appropriate moa hashmarks and shoot. Much easier to process.
This is the MOA reticle on my Vortex Razor HD Light Hunter and I find it VERY quick to use, simple, accurate and effective.
I guess it all depends on what you're doing with it and what you can get used to. But I guarantee you that if you choose to go with the bdc reticle your eyes will naturally attract to the circles which provide you with the least accurate point of aim.
I've came to prefer reticles that are clean and precise. Aim small, hit small.
Once again, just my .02