I have Rem 700 Classic chambered in .300 Weatherby. After pillar bedding the action, squaring the bolt face and working the trigger it still remains a 1.25 MOA gun with muliple powder, primer, bullet combinations. The question is if it becomes an action donor what is the best choices for caliber? Can this action be used for a .338 edge or Lapua? I'm also looking at shooting economics; what is the "cheapest" magnum caliber to reload. I also have 6.5x284 to satisfy my small bore shooting addiction so I'm thinking large bore.