Re: Will a 338 edge work in a Sendero 338 ultra mag?
Before you go for the expense of rechambering your 338, I would shoot that barrel out. After you shoot it out rebarrel with a high quality barrel like a Lilja or Broughton. Then go for the 338 Edge or one of the other 338's with a longer barrel. You won't see the full benefit of one of the 338 wildcats with a 26" barrel.
My 2 cents
"A tie is as good as a loss, and no one remembers second place."