Nope, five live and one blank. An experienced rifleman can easily discern whether he fired a live or a blank, as the recoil from a blank is significantly less (especially with large-grain bullets). However, there is reportedly a subconscious psychological tendency over time to "forget" the force of the recoil, which allows the rifleman to deduce that he was the one with the blank round; it is simply a guilt-reduction mechanism. Plus, at the time of the execution, the riflemen will typically subconsciously convince themselves that it is their rifle with the blank, and when the order is given to fire, they will not hesitate to pull the bang switch. That means the condemned is hit by a volley of six rounds of .30-30 almost simultaneously. Just one round of .30-30 to the heart will likely be fatal; six at once is a guarantee.
Edit: Almost forgot. It's from a distance of 30 feet.