I have always had good results with Remington green box centerfire ammo. No matter if it was 243, 30-30, 30-06 or 7x57 the stuff always shot very well. I have to work to get 243 handloads to match the accuracy I get using factory ammo.
But like Jay said, good luck finding any 223 ammo.
Some people think an English Bulldog looks great... many more people can't tell one end from the other, even by smell.
A village in Kenya called. They want their idiot back.