Free: Contests & Raffles.
I had JES in Cottage Grove, OR rebore my old -06 to 35 Whelen. It was the first rifle I ever purchased (used) when I turned 18, and wanted to keep it around so rebored it. I considered going 338-06 as well. Both are good calibers to turn a old -06 barrel into, without having to re-barrel. If going the rebarrel route, I'd probably go 280ai if it were me.