Even a fairly experienced, fairly long serving and well qualified Armourer would be pushed to say, as you have, that a rifle has probably not fired more than, say, 100 rounds in its life CHB! With the best will in the world, we had barrel life down to what we called 'quarters of life'. Sniper rifles, by definition were never thrashed to death, were one-man-one-dog items of equipment and generally lead pampered lives - unless they were part of the sniper div/training wing of course - of which, lo and behold, I was an Armourer
But this thread is really all about New Zealandrifles with flowery descriptions. And I've told what I have seen there and know about. Like I say........... Buy the rifle and not the story!