ok, as promised here is the link:
THR MD Shoot thread
And the directions from that thread (thanks LeadPumper on THR):
**Hap Baker Range
Carroll County Landfill
Route 140
Westminster MD 21157
Contact: JoAnn Hunter
Phone: 410-386-2103
Shooting opportunities for small and large caliber rifle and pistols.
Open to the Public. Daily or season passes are required Days and times vary.
Coming from Baltimore beltway:
Take rte 795 all the way to the end, it then turns into rte 140 north. Go a few miles until you see the sign for the county landfill on the right (I believe it's shortly after passing the Reece Vol fire Dept on your left).
Turn right into the county landfill and follow the signs all the way to the back.