Here's some shooting info about the SBNF;
Target shooting is only allowed in designated sites - Areas with designated sites for target shooting
Forest Road 1N09 East of Highway 330 - CLOSED to shooting and motorized vehicles.
Forest Road 3N14 North of Highway 38 (Closed - due to Butler 2 Fire)
Forest Road 2N02 East of Baldwin Lake Road - Open
Forest Road 2N93 Lighting Gulch - Open
Forest Road 5S07 North of Highway 74 - Open
The San Jacinto Ranger District has general forest areas open to target shooting, call the Ranger Station for locations - Open
Here's the linky;
http://www.fs.fed.us/r5/sanbernardino/recreation/target/index.shtml