Re: Savage LA with .470 bolt face - which LR caliber?
Without hesitation .284win!
However you do know that buying different bolt heads for a savage is really easy, right? So don't let the bolt head govern your caliber choice. Get what you want, first and foremost.
How important is barrel life for you? Since this is a savage you can -with minimal equipment, change barrels, and have a quiver full of back ups. In that case I would go with the 6.5-284 win as it is a more "proven" 1000yard caliber than a straight .284win.
"Out of range" is a theoretical concept as far as I'm concerned. Send it!