I don't know but here's another thought. All indoor and outdoor ranges could possibly face legal consequences if they allow their customers to use the high capacity mags while on their premises..........
They'll probably put up signs prohibiting their use.......
I compete in IDPA and USPSA matches, wonder if these are now canceled in New Jersey?
You don’t have to target practice with a high capacity magazine. A 10-round is fine. The rifle will weigh a little more with a loaded 30-round magazine, but that won’t affect your aim.