No I know that's the point, it offers the very bare minimum, because there isn't anything else aside from your own experience.With all respect Rosie that rule offers no guidance at all
But what could you do to make the rules tighter without training the refs? Each gun ref will be different, will hold the gun a different way, pull the trigger a different way, unless you have a gun testing machine which bumped the bottle with a measured force, you're always going to have inconsistencies because we're human.
I can't/don't want to chrono ref, because I know the rules but I don't know anything about guns aside from egos, don't know anything about cheater boards, how triggers are set up differently on guns, I would be bad at it, yet I get given the chance to do it every time I ref! That says something.