I've had good luck with every .223 bolt gun I've ever had- they have all been good shooters. So far the list is:
Remington 788
Savage 340 (took a little tweaking)
Ruger M77 Mk2
Remington 700
My neighbor's kids used to love shooting the 788, I zeroed it dead on at 100 yards for them. They liked to fill 2 liter bottles with water and put them on their sides facing the bench. Then they would take turns trying to shoot through the bottle cap, they got pretty good at it and the bottles blew up better when they managed good hits.
lpl/nc