And your still missing the point by a mile.
First of all. The 700's used in the military are hardly 700's. Donor actions, yes..... Completley reworked and built, yes. You don't think the Marines would love to start with a purpose built custom action with all the features they like?. Just beacuse the military uses something, does not mean anything but generally, they were the cheapest bidder and they were able to meet a bare minimum standard.
Second of all. Run the Numbers. How much does a 700P .338 Cost? If you plan to keep in bone stock, then Yea, its kind of a no brainer as far as price goes. If your going to rework it.... You are paying the same, IF NOT MORE for a bone stock, shitty QC remington factory .338 action as you would for Custome, purpose built action. You know, the 700 clones done right the first time... Add in truing, barrel, chanmbering, stock, DBM,ect.. and you are much better off starting with a custom action.
The 700 actions in .338 are just as propiretary as any custom action, so not sure what your getting at. If anything, they run the same stocks and accsesorries since most ARE CLONES.
Ok well then buy one of your custom actions and enjoy it. I have my Remington and am very happy with them. In the endbi shoot the same or better. And theyre not shitty at all thats just your opinion.. like an asshole, we all have them.