So let's say that I have a remington M700 and decide to put a new remington bolt in it, much easier to do than swap out a barrel, even on an encore.

Is the argument here that I shouldn't have to test the headspace because it is a remington part?

Would remington be liable if I didn't?

Or is not checking headspace specific to the Encore only?

If so does the Encore make the specific claim that you do not need to check the headspace when swapping barrels?