Schofield Rod and Gun has skeet and trap ranges. Also open shoot with shotgun.
People who don't have base access can go there and shoot?
People who don't have base access can get on-base by going through the visitor inspection lane: license, registration, proof-of insurance, open the hood, trunk etc, depending on "threat conditions".
For all persons, to bring firearms onto Schofield, the firearms must be registered in-advance with the Army Provost Marshal (military police) before you bring them on-base. Army registration requires showing the HPD registration, not the firearm itself.
if you're not military-affiliated, or DoD-associated, your best bet is to find out if any of your friends or relatives are SRGC members, and if they'd be willing to have you as a guest at one of the range sessions. Keep in mind this is a military-associated private organization, not open to the general public. All of the above still applies.
Shotguns are allowed at the KR4 range, up to 12ga, no ammo restrictions, along with pistols, and rifles (7.62 and below). In addition to goings-on at the SRGC Skeet Range.
this is all detailed on the SRGC website, in their Consolidate Range SOP:
https://www.srgchi.org/publications.html.