Will be buying my 5 year old son a youth Savage rifle in the next couple of weeks. I always felt a 243 loaded properly is a deer killing machine. I noticed the same rifle can be had in 7mm08, a personal favorite. Full power 7'08 isn't an option for his small frame. I came across this reduced load data using H4895:
http://www.imrpowder.com/PDF/Youth%20Loads.pdf
I assume the reduced 7'08 would be in the same recoil range as the full boat 243. The biggest advantage to the 7'08 is that as he grows it will give more versatility. I look forward to your feedback.