If the goal is to get your kid shooting centerfires, the managed recoil loads are fine. If the goal is hunting, I would be very careful in my choice of game and the range at which it would be taken. The Remington 125g Managed Recoil load for the .30-30 runs out of poop pretty quickly, dropping to 919 foot-pounds at the 100-yard line. I would think with proper placement it would work fine for small deer and antelope within that range.
I have to say, however, I have never been one to think that such loads are a good choice for hunting. Instead I tend to believe that in most cases if a youngster cannot handle full-power .30-30 loads they are probably not ready to hunt. Just my opinion, of course.