The size of a cortical column / macrocolumn varies somewhat based on sensory area, level in hierarchy, and species. The exact number of minicolumns per cortical column is a bit hard to pin down precisely.
All our sparse distributed codes use an M-out-of-N coding strategy. In our Columns paper we assumed a cortical column contained between 150 and 250 minicolumns. See the section on Capacity in this paper - in that section M was 10.
The robustness of these codes increases dramatically as N increases (see this paper).