I80 East towards Fernley; get off on exit 36 and cross north back over I80 and when the pavement ends go straight through the fence and follow the dirt road back maybe 1/2 mile and you'll find a big pit where a lot of people have been shooting for years.
http://maps.google.com/maps?q=Fernle...wloc=addr&om=1
(cust and paste this into browser if it doesn't work)