I think gun fit needs to be considered here. Chances are your .22-250 is too big for your son to assume a really good shooting position. When I was growing up my buddy's dad had a rifle that everybody knew kicked like a mule. It was the rifle everybody dared everybody else to shoot. When I got older, and looked at it, I discovered it's only a 7x57- but it's a european stocked BRNO with high rings, and lots of drop in the stock, so the comb gets a running start at the shooter's face. Pair that w/ short arms and lack of shooting experience, and you've going to cause a flinch. all this from a mild mannered 7x57. Pair bad fit with the sharp blast of the .22-250, and it probably is intimidating. Now, if you found a takeoff stock that you didn't mind modifying so it really fit him, and didn't tell him that it was the same gun that already intimidates him, he may well learn to shoot it well. Find a model 7, or 700, or Stevens, in a suitable chambering, mod the stock to fit your son, and get him involved w/ the process. Let him help w/ the handloading too- he'll be hooked. When he outgrows the stock, pick up another one and carry on. I'll jump on the .223 bandwagon too.