Gun ranges in Oregon and elsewhere, vary greatly in established etiquette. Some are little more than a hill with some dirt sprinkled about. Others are state-of-the-art facilities with a full-time Range Officer (RO) and a host of restrictions on method of draw, firing rate, ammunition choice, etc.
At any but the most primitive; a fairly standard set of range commands may be used to keep everyone safe. Here they are, in the order they will likely be encountered by arriving shooters:
"Cease fire! Cease fire! Remove magazines and open the actions on your firearms. When you have done so, step to the rear of the shooting area!" You have just entered a cease-fire period, during which no firearms or ammunition may be handled. Should you wish to leave the range, you must wait until the cease-fire period is over.
"The range is clear! You may go downrange and check targets!" Now is the time to go down and hang targets at the distances you desire to shoot. Hang several of them, as it may be a while until the next ceasefire period. If you are preparing to leave, now is the time to police your brass and collect old targets. PET PEEVE: Don't get all the way down to the 200 yd target, only to remember your stapler is still back at the booth! The minute you waste, belongs to everyone.
"When you return from downrange, step to the rear of the shooting area!" The RO is trying to keep people away from firearms/ammo whilst folks are downrange. Also, this often gives the RO a better field of view. PET PEEVE: This is not the time to decide to try to reload a magazine on the sly. The ceasefire is nearly complete.
"Has everyone returned from downrange?" At this point, the RO is basically asking you to confirm what he already believes, that everyone is indeed back from downrange. Take a look downrange, and make eye contact with the RO. PET PEEVE: Why not help out by looking hard for someone who hasn't, rather than mindlessly nodding your head yes?
"The range is HOT! Commence fire!" You are now in a shooting period, and may leave if desired. You may handle a firearm and/or ammo without reproach from the RO. PET PEEVE: Do not use the firing period to try to get at rifle or pistol brass that is in the gravel in front of the firing line!
During an NRA or other official shooting event, the RO will issue other commands. These deal with the number of rounds to be loaded and duration of shooting period. Also the present course of fire, and scoring instructions. Also queries about "alibi" (my gun jammed/doubled, etc) shots, etc. It's involved, but mercifully self-explanatory.
A common tradition: Anyone who appears to be of good character and admires your firearm, may be allowed to shoot a few rounds. It is good manners for that person to allow you to shoot a few rounds through something he/she owns, too.
Three common restrictions (especially for indoor ranges): Speed draws of handguns/rifles are generally NOT permitted. These can cause ricochets, floor/wall chinks, and holes in lightly armored roofs. Jacketed bullets are generally not permitted. These cause irrepairable damage to the steel backstop.
Finally, firearms not in use must have actions open and magazines removed, or be kept cased, at all times.