I put 5 make/model/serial# on my Shooters form. There is no limit apparently and the retired NJSP instructor said that per the statute they didn't even have to do live fire, only teach use of force and then you demonstrate you know how to safely handle a gun. We shot one gun each anyway but the form shows I qualified with 5, the 5 I listed. They never even tallied the Q targets to see how many hit. The only the person who flunked out was someone who's gun kept jamming. They sent her packing and said she needs to clean it and come back.
For now we all go through the process as is. Once all the civil rights lawsuits start to roll out, text and history at the time of the ratification of the 2nd & 14th amendment, most of this silliness will end. The people who write the NJ bills are not firearms savvy, they are just frightened children trying to stop the bad guns.