There are signs on the range that talk about the loaded limit. The $100 fine I heard from local gun people. There's only two state ranges anywhere near me and both have signs stating this limit.
Here is the specific rule. Apparently it is for all PA state game lands -_-
(6) Possess, load or discharge a firearm that contains more than three rounds of single projectile ammunition, except as provided in subsection (c).
(c) Exceptions for a handgun range. At a Commission range specifically designated as a handgun range, it is permitted for an individual to load and discharge a handgun containing a maximum of six rounds of single projectile ammunition at any one time. Other rules and regulations pertaining to shooting ranges under Commission ownership, lease or jurisdiction shall be in effect.
http://www.pacode.com/secure/d....html
Modified by Loki at 11:20 AM 4/28/2009