Thanks for all of the very useful feedback what a very decent forum to be on.
Looks like a fixed 36mag with a very fine reticle is the way to go. Just by chance!? an offer of a Weaver T36 has come up at a reasonable price so I am very tempted to go with that.
Interesting stuff from Rich re. the Hammerli, I was wondering whether they were up to the mark, no one I know has one. There are a couple of Anschutz that are up for sale that I am going to investigate, one is a 2002 and the other an 8002
Thanks again all and keep up the great feedback.