In the vast majority of cases, yeah. Only a Sith deals in absolutes, very few rules have no exceptions. A commercial shooting range with a negligently designed back stop gets to bear some or all of that liability in the case the backstop was presented to shooters as safe when it wasn't."

"Know your target, what is in front of, behind, below above and do the side of your target." Okay, at what point have you satisfied this rule?

Does every shooter personally inspect every backstop at every range every time? Or do you trust that the back stop is safe because it's a shooting range? Do you need to do non-destructive testing such as eddy current analysis or X-rays between every shot to make sure the backstop is still capable of stopping each round or is "It's a ten foot thick wall of dirt" good enough?

I can see a case where a negligent range owner convinces shooters their range is safe when it isn't, in which case I'd have to ask "Would a reasonable person going to shoot at that range be able to tell the range wasn't safe?" If the answer to that question is no, that the operator of the range made it look safe when it isn't, I'm not convicting the shooter, I'm convicting the range operator.

IN ANY CASE it doesn't seem that's what happened here, because the range in question seems to point in pretty much the opposite direction from the ball park. I can't see a scenario where he who pulled the trigger isn't guilty of something.