Actually long guns can have chambered rounds now too. At one time only those with Handgun Carry Permits could have loaded long guns in their vehicle (without one in the chamber) but after the law change if you can legally posses the firearm (handgun or long gun) you have have it in your vehicle, loaded (including a round in the chamber) without a permit.
In general there is no legal way to openly carry a loaded long gun on your person unless it is incidental to hunting or one of the other listed activities in the law.
It is polite to provide a cite - Forum Rules too.
" CITE TO AUTHORITY: If you state a rule of law, it is incumbent upon you to try to cite, as best you can, to authority. Citing to authority, using links when available,is what makes OCDO so successful. An authority is a published source of law that can back your claim up - statute, ordinance, court case, newspaper article covering a legal issue, etc."