To reiterate in the simplest terms:
If you don't have an Ohio Concealed Handgun License (CHL) or recognized equivalent:
- You may not have a loaded firearm in a vehicle.
- You may not have loaded magazines or speedloaders in a vehicle.
You may NEVER have loaded long gun magazines in a vehicle, whether you have a CHL or not.
When open carrying outside of a vehicle, you are STRONGLY advised to use a standard Outside the Waist Band (OWB) holster WITHOUT A FLAP. People have been arrested for unlawful CCW for both carrying in a military style flap holster and for using an uncovered Inside the Waist Band (IWB) holster.
An unloaded firearm and unloaded magazines and speedloaders in the trunk, especially in a gun case should be completely fine when driving.