This is kind of gray to me, but I think it is referring to designated recreation areas because 629-025-0040 says you can target shoot, so you have to have a loaded gun. However I am not sure if a CHL exempts you from those designated areas like it does in other situations.
General Forest Recreation Rules
(9) Target Shooting.
(a) No person shall place targets on live trees or shoot live trees for any purpose.
(b) No person shall shoot across or along any road or trail.
(c) No person shall shoot carelessly, recklessly, or without regard for the safety of any person, or in a manner that endangers, or is likely to endanger, any person or property.
(d) Persons engaged in target shooting shall remove from State Forest land all shell casings, targets, and other debris resulting from their use.
(e) No person shall shoot targets other than those commercially manufactured for the specific purpose of target shooting, except for paper targets privately manufactured by the person or people engaging in target shooting.
(f) No person shall shoot glass of any kind as a target.
(g) No person shall shoot appliances, furniture or other debris determined to be garbage or refuse by an enforcing officer.
(h) Target shooting and other shooting related activity will be prohibited from one half hour after sunset to one half hour before sunrise.
Designated Recreation Areas.
(1) State forest lands designated by the Forester as "Designated Recreation Areas" may include, but are not limited to campgrounds, camping areas, day use areas, trailheads, staging areas, and boat launch sites. Maps showing the Designated Recreation Areas shall be kept on file at the State Forester's office and the applicable District office, and shall be available for public inspection during normal business hours.
(2) General Forest Recreation Rules as outlined in OAR 629-025-0040 shall be applicable to Designated Recreation Areas. In addition to those rules, the following rules shall apply:
(5) Firearms, Weapons, Explosives: Within a designated recreation area no person shall:
(a) Hunt, pursue, trap, kill, injure, molest, or disturb the habitat of any bird or animal;
(b) Discharge any firearm, pellet gun, bow and arrow, slingshot or other weapon capable of injuring any person, bird, or animal;
(c) Possess any loaded firearms; or
(d) Discharge or cause to be discharged any firecrackers, explosives, torpedoes, rockets, fireworks, or other substances which could be harmful to visitors or resources without written permission of the Forester.