I absolutely adore my Bushnell Elite 4200 6-24X40. It's big and long, I won't lie. But I have it on my 24" Varminter, it's kinda a dinosaur anyway, so I don't mind.
Now, I will tell you this. The internal adjustment on this scope is weak. I want to say it 26MOA? However, I don't shoot .223 much past 400 or 500yds. Past that, I'd rather go to something with a little more gusto. However, if you are adjusting your scope for elevation, this scope will peter out around the 500yd mark IIRC. However, keep in mind, at the at point most of your lighter bullets are gonna be moving pretty slow (read, dropping pretty fast) so even a 50MOA scope MIGHT get you out to 700yds. Given you ranges, that might be a deciding factor, but it wasn't for me.
Just a few things to think about. However, the Bushnell is crystal clear and I love the Mil-Dot reticle.
Gundraw