Sam,
I'm running three RR's, two with chrome moly bbl's and one with stainless. In my experience, the Wilson CM and SS air gauged barrels are some of the most accurate production barrels out there.
It's aggravating but the three in my stable shoot circles around my pet 6920 and my LMT build.
If you clean them, even occasionally, and avoid extended FA fire under extreme field conditions, they will last as long as any other barrel and may/ should provide improved accuracy as a bonus. Throat errosion is very dependent on who, what, when, where and how much. For civilians it is a non factor, the rifle/ bbl will probably outlast you, given even nominal care.
Enjory the RRA, it's a quality product.
P.S.
On the 'chamber' subject, I concur with Mr. Roberts. I've never witnessed or heard of a Wylde chamber issue.