Are there any tire/tube/rim combinations that are particularly resistant to pinch flats? Any that are prone to same?

I'm currently running Vittoria Open Corsa Evo CX's with light weight butyl tubes on Panceti SL23 V1 rims, and each of my last 2 rides was interrupted by pinch flats despite making sure the tires were properly inflated. Both of these happened when riding over small (< 1") bumps at moderate speeds (< 17 mph).

Thanks