Taught my oldest grandson (15) how to reload yesterday, so today I took him to the range with some of the reloads he made.
I was very pleased the 223 bolt gun was shooting 3/4" at 100 yds. That is easily good enough to waste a chuck at 200 yds, and it does not need to do more than that.
I got a Ruger American Rifle in 30-06 when they first came out. At the time, they asked purchasers for suggestions. I suggested they also chamber it in 223. They replied that they did not intend to do that, but I guess others made the same suggestion because sure enough, they soon chambered it in 223. Mine is the light weight standard model, which is no longer offered in 223 (only the heavier barrel "predator" models are, which are tack drivers) but weight 1/2 lb more.
My load is fairly stout, a 52 grin Hornady BTHP over 26.5 grains of H-335. The 223 is very pleasant to shoot, you barely feel any recoil.
The important thing is, we BOTH had a good time!