I have been running a Bushnell 3200 Firefly 2.5-10x50. The scope came on another rifle I traded for, and with the high PEPR mount on my AR I figured it was a good spot to put a scope with a 50mm objective. While it's been working great I am starting to run into educated coyotes hanging up at 300yds or more. My 223 load shoots great but is pretty slow at 2964fps with a 55gr V max.
I did some looking at scopes with reticles designed for longer shots. I think the Leupold VH and Burris Predator scopes are designed around 22-250 or at least hotter 223 ballistics. I couldn't make them fit my drop numbers and stay with a zero of 150-200yds. I did a little more looking and found that the Leupold B&C reticle designed for slower big game rounds and used on the triangle designed for more drop fit my numbers really well to 400yds. I think I've talked myself into a 3.5-10x Leupold to put on my primary AR and moving the Bushnell to my back-up AR. Wind holds won't be right but drop holds should work. I'll mount it, put it where I think it should be at 100yds, and then fine tune my zero on a 300yd target on a calm day and see where I'm at.