The Ruger would indeed be a very nice action to build a dedicated creedmoor rifle on - the right size and proportions for it. I'm still tempted to tear down my own #1, but it seems a shame to to use a perfectly good and accurate rifle for the job, so I keep postponing it till the barrel is finally shot out (which will take quite a while at the rate I am shooting it...).
Unfortunately, used #1's are pretty rare and expensive over here. :-(