I shot a Service Rifle match on Sep 23-24 at Connaught with my wife's 14.5" carbine and her donut of death reticle. I was happy as heck with the bull-5's and vbulls I was getting. Worked for me at 200m and 300m.
She loved the donut of death as Rifledude will attest, at the Milcun / OSA Tactical Carbine Clinic and match in October. From 100 m and closer (10 meters) my wife and I just rocked with that donut reticle. That carbine shot like a laser beam as long as the shooter did their part.
On my 16" carbine, I've mounted a TA31 RCO M4 with chevron reticle. I prefer the finer aiming point since I will be shooting at ranges up to 500meters. My wife will only be shooting up to 300 meters with her donut of death reticle. That donut works for her and her style.
You on the other hand, must choose the reticle that works for YOU....
Hope this helps,
Barney