Hi, a very good question and one to which I do not know the answer.
You could also ask why some people drive Skoda's and others drive Jag's or why some buy a new car every 3 years and others keep their car while ever they keep running ?
If some one wishes to give me a few thousand I would be selling my Hammerli straight away !
I don't think any Hammerli owner would say is was the best gun in the world, it's just a good buy for the money !!!