RE: Caliber for young shooters?
In this case, I like the .257 Roberts, 6.5x55 Swedish, .260 Rem, 7x57 Mauser and 7mm-08 Rem.
The Roberts, Swede and Mauser are perfect for handloaders, because most factory ammo is downloaded (read: mild recoil) and perfect for young shooters to practice with. You can then load hotter when they are ready.
The .260, and the 7mm-08 are ready to rock right out of the box.
I love 'em all, though!
Good Dogwork and Good Hunting