In truth snares can be set anywhere from 4 to 6.5 inches high and they will still catch rabbits, depending on location and ground cover conditions. As a general rule setting towards the higher end will produce most catches. It all comes down to experience at the end of the day. As with all trapping, you must experiment until you find the setting height that works for you.
Rolfe.
Whilst I agree in part with what you say Rolfe, at 4"you are going to get in the main more misses than hits, and those catches are by default rather than design, and often resulting in bad placement of the c