I haven't been on THR in a long time, but I've been getting back into the shooting sports lately. I want to buy my son (10 yrs) a nice, but inexpensive centerfire bolt rifle. I bought him a CZ Scout .22LR a couple years ago and he has gotten excellent on it. He is starting to outgrow it, and wants " something bigger". He has quite a bit of experience shooting my milsurps, including 30-06, 8mm Mauser, .303, 7.62x54R, and other calibers, so you can see he can handle the big stuff. However, I want him to start learning the proper way to shoot accurately... proper hold, breathing, trigger control, and all that. I was thinking about getting him a .223 (or other light caliber). I don't know if there is such a thing as a nice, accurate, quality rifle for, say under $500. Also, for a .223 rifle, what twist rate do I want? I assume 1:9 or 1:10? I have Federal mil-spec ammo (M193) which is 55gr, and I have Winchester 62gr bullets for reloading. I notice some rifles have a twist rate something like 1:14..., why so slow? any ideas for quality, inexpensive rifles? So far, I see that Savage seems to have a few models that fit the bill.