Normally it is around September if I remember correctly. The last two were at S.A. Hunter's facility in outside Pretoria on the Pretoria Cullinan road off Zambezi Road.
Normally Wyan organizes it with Hennie(Sniper). Contact them
According to the SAFTAA calendar (under club shoots) the CoC will be held on 5-6 September, and that's no secret. This event is run annually by Wonderboom Club and SA Hunters. For more info contact Wyan Schoonwinkel (he's leaving for business in Las Vegas anyday now).