Hi All, did some browsing over the weekend and found some decent websites re airguns.

http://www.americanairgunhunter.com/airgun_hunter.html
This is the main page, see specifically the link;

http://www.americanairgunhunter.com/agquart.html
for 2 pdf downloadable airgun magazines. they seem fairly nice with articles and reviews, I have not gone through these.

There is also a link on the main page to a local Eastern Cape outfit that caters for big bore airgun hunting.
www.hounslowsafaris.com

The Americans seem to be quite into their large calibre airgunning.