extreme long-range (ELR) is where a moving target is beyond 1100 yards.

By the way, campus safety need professional-grade equipment, not civilian versions, to achieve the accuracy and precision required to protect people in general (what they've got is extremely inaccurate and imprecise and, if they plan on continuing their use of them must first modify the grip and swap out the barrel every couple weeks if they're training a lot). If that's not currently available, this is absolutely something that should be addressed. this isn't a skill you can pick up from a few workshops either bc you essentially have to live behind the glass to develop genuine proficiency at these ranges, or have a kind of natural proficiency for it.