So what rifle is best? It really boils down to what caliber they can comfortably handle.
The youth model New England Firearms single-shot .243 that Wolfe used during his hunt is a good choice for size, but also caliber.
The .243 is accurate and packs enough punch for deer without the recoil of larger bore calibers.
Other calibers adults should consider for youth are the .30-30 Winchester, The 7mm-08 and .257 Roberts.