A misfortunate event, definitely.
A Criminal matter?
No.
Good Law is not about jesuitry for electing scape goats so deputy DAs can do the chest puffing Rooster Walk in their way to a pay raise.
"Well, we could not solve this case far as there even being a reason to prosecute anyone for anything, so, lets just blame someone who we feel can be associated circumstantially, and get on with it, prosecute them..."
Smells bad...is bad...
Maybe - if a reasonable investigation would seem to support it - charges for some order of Negligence, being brought to bear upon all those present at the Range who were shooting Arms which fire the offending Bullet-type-example, during that time slot of the sad misfortune of the stray Bullet...maybe...
...but to charge the property owner for some sort of responsibilty criminally, suggests one bad smelling DA running things around there, to me...to do that, or conceed to a subordinate doing it.
Bad smell, bad taste.