You'd need 7 bullets to even it out. Otherwise, it'll always tend to drop down. All slots would need to be filled to counter it. Only way to ensure an equal distribution of chance is to ensure death. Unless, of course, we had weightless bullets of some sort...
Or use blanks. Thats closest you will get.
Killing yourself would be pointless though, your going to die anyway. Unless the death is painful and drawn out, I dont see any reason.
Well aside from a "[censored] you universe, I choose when I die" thing.