The Weatherby actions are realy nice , very stiff , realy smooth , nice short bolt lift and they can be made to shoot with any other factory action which is pretty **** good.
BUT , the nine little locking lugs are a pain in the nuts to get all lapped and square so all nine make contact.
I have done two , one I hand lapped the lugs and the other I used the lathe like on a regular setup and to tell you the truth I think I'd rather hand lap the dang things. I don't know of many smiths that will actualy take the time and do it with any sort of excitment, alot of guys will just recut the action face and barrel threads and the bolt face not worrying about the lugs and they will probably shoot great and into some guys 1/2 moa prommise , but in my oppinion any job worth doing is worth doing right. I talked to Charly Sisk about the process and he admited that he would rather do a Rem 700 but diden't mind the Wby if thats what got the bills paid.
As far as strength , I personaly think that they are every bit as strong as the Rem 700 maybe a bit stronger , they will accept the big 378-460Wby case heads as well as the Lapua with ease.
If your looking to build a big long range hammer like the 338Kahn which is about a small click above the 300RUM in case capacity then they are great , IF you already have the action , if your gonna spend $1000 on an action to build your rig then get a custom and be kind to your smith !!!