DF- From a purely economic standpoint, the MRC bbld action seems like the way to go. However, smiths around here don't like them much claiming they are very rough and need quite a bit of work to make serviceable. Which translated into $$. Myself, I don't like the bolt handles or bottom metal on mod 70's/MRC's, so would have to do something different there too, all adding up. I'm trying to build a 416 Ruger myself, and would like to use a Mod 70, but these issues keep creeping up.