I noticed a few years ago that the influence of Philly, NJ and NY is slowly working its way through eastern PA. Look on a map of the still-open State Game Lands ranges, and notice how many are still open within easy driving range of the Delaware river.

Huge population in the area, but the ranges have been shut down. My guess is that it's not a coincidence, it's because of large numbers of new shooters who were NOT raised as hunters, were NOT raised with Dad or Grandpa teaching them gun safety. Too many of them show up with an AR or AK or Glock and just blaze away like pyrotechnic gods, blowing apart support posts and trees and indoor walls and ceilings, often with stolen guns and zero knowledge of the laws or common sense.

Just a guess. But look at the map. One range each in Berks, Chester Dauphin and Lehigh Counties. None in Philly, Delaware, Bucks, Montco, or Northampton.

http://www.pgc.pa.gov/HuntTrap/State...s/default.aspx

https://www.google.com/#q=pa+state+g...i:1,lf_pqs:EAE