You're going to get mixed reviews on the MRC actions.
I have a magnum action here, unbarrelled and in the white. Every now and then I'll take it out and play with it. I just can't find any of the things that guys complain about. Some day, I'll build it.
I also have had about five more of their actions in various flavors that I eventually sold. I returned one to MRC and swapped it for a different version (stainless for CM) with not a bit of trouble from them. Not a thing wrong with any of them, just changes of plans (I've been known to sell a M700 action or rifle as well, so it's not that I "unloaded" the MRC actions).
A buddy bought a barrelled action in 30-06. Loves it and it shoots great.
These are my only hands-on experience, but every bit of it has been good.
