Guys,
A few questions before I pull my 243Win barrel off and fit another Stevens take-off barrel in 308Win.

Firstly ... is it recommended that some anti-seize type material be used on the barrel threads?

Secondly ... I have a take-off Sako barrel chambered to 375H&H, which I wish to re-use but chambered to 375/08. I've had a Rem 375H&H barrel re-chambered to 375/08 before and fitted to a Rem700 action ... but these headspace on a barrel shoulder and don't use a barrel nut.

Can take-off barrels from other makers be re-threaded to allow use on my Stevens whilst retaining the factory barrel nut, or will it work with some but not others? I'm keen to retain the nut (unmodified) for headspacing rather than use a barrel shoulder.
Cheers...
Con