.223 (AR and Savage 12FTR), .243, .308, 30-06.
It works well enough in everything I shoot to use it exclusively. My Savage 12FTR and Rem 700 Tactical .308 both shoot cloverleafs with it and the others shoot as well as I can with iron sights. Light 30-06 loads shoot very well in my Garand as well.