I appreciate the feedback,i am not to concerned about barrel life the 2 guns i have slated for swapping the barrels out are not going to see that much shooting,i looked at doing this with the dakota cases before ruger/hornady came out with the 375,i thought these would work just as well.
These are gonna be call your "squeak"at 1000 yard guns and deer/elk medicine during the fall,anyways my thoughts are a pretty health dose of US-869 and 130 to 140 maybe even as heavy as 156gr woodliegh ought to do quite nicely.