I really need to stop watching youtube vids on reloading. It's getting expensive. So now that I know there's a doohickey for measuring ogive length, I have to have one. And a small base die, because not reloading for 5.56. I dunno if my 223 Wylde chamber will like 223 sized brass. I dunno why but the guy on the video sez I need to do that, even though external case dimensions are the same for 223/556.
I am once again referring you to my post summarizing a conversation I had with a lawyer from Nappen's office. NJ is actively prosecuting people who have manufactured firearms out of state and then brought them in state.
Your interpretation of the statutes may be "correct", but chances are high that if your manufactured firearm comes to the attention of the NJ criminal justice system you will be prosecuted.
I'm going to call again and see if any of the cases were settled or went to court and if there is any case law at this point.
Looking at what Hodgon posts for 115gr and CFE-Pistol it seems like you are a little on the light side.
Lead round nose starting loads are 4.9gr and they post some hollow points with starting loads at 5.3 gr.
I would use the HP data as a start at minimum load and ladder up from there with a chrono. Good luck and stay safe.