Since my "gunsmithing" abilities are limited to barrel bedding and refinishing, I have a question regarding barrel swaps. The barrel has been "ringed" on my 722 222Rem. It's visible w/a good light, and you can feel it w/a tight patch. A friend gave me a new 26" factory barrel. Gunsmith who has done some work on my stuff seems reluctant to install this barrel, thinking headspace adjustment while keeping the sights where they should be is problematic. Due to my ignorance, input is needed. What do you think?