Posted longer reply in the other post; then thought a bit more:
Your employer should be providing the appropriate Personal Protective Equipment (PPE), this would include eye and ear pro; along with a properly rated vest.
Ask your employer in writing,
If they say no need (get it in writing), let your loved ones know. I am sure Labor and Industries will have a field day.
If they say yes, then you are not using your personal equipment at work.
If they say no, and you wear your own equipment, check with your tax advisor for the appropriate tax write off. This may go for batteries for hearing pro, replacement eye pro, ammo used on the range by you, any firearms, holsters etc.
As I am typing this: What is your company plan should there be a medical emergency on the range? Is it different than if it is a gun show wound (GSW) or heart attack?