I had a chance the other day to have a look through a Weaver Grand Slam 4.75x40 and was stunned by the clarity. The chap showing it to me maintained that it was an excellent stalking magnification, and the quality was undoubtedly superb (as far as I could tell!).
I understand that 4x used to be very popular for stalking, so why did everyone start changing up? Do you think fixed low mags still have a role or have they been rendered obsolete? I think Weaver have now discontinued the fixed mag Grand Slam, so they clearly think it is outdated!