I beat around the bush in my first post so Ill be more blunt in this one. You are better off with the .25-06 you already have than if you could make it a .257 wby. for free. There. I said it.
Can it be done? Yes anything can be done for the right price.
Should it be done? NO
Now if you will excuse me, Ive gotta hop in my Studebaker and get down the road. Im late for the bingo tournament