atmag: you have named a whole bunch of great cartridges but you named my favorite, the 6.5 Swede. I would go find myself a good looking Swedish Mauser, Model 38, with a good bore and a #1 on the stock disc, cut and weld the bolt for a scope, install a Bold or Timney Trigger and a bolt block, scope that baby, maybe bed the action if it needs it, and shoot the snot outta it. It will outlast you and junior and your son will hand that rifle off to his children.
Now, this is a military surplus type rifle. The neat thing is that although you have purdy ADL, your son just might drool over the mil-surp look. Of course, as he gets older and has more of his paw prints on that one than you do, you can set to sporterizing it and making it look like a brand new Mauser sporter, just for him. BTW, shooting the 6.5 Swede in the Model 38 is about as painless as can be. Might be just the ticket. And also BTW, although the Swedes are in 6.5 mm caliber they are not 'light', per se. The 6.5 Swede is good for just about anything except large dangerous bear. Lots of guys use it for medium size bear, hog, moose and elk, but it's an easy one to shoot and the Swedes put great quality into their rifles. Ask anyone on the mil-supr forum. HTH. (OK, now all you other caliber guys can take potshots at me ifin ya'll wants to but, I've said my stuff and he did mention the 6.5 ya know.........) Mikey.