At Archbald range few years ago on a Monday and had range entirely to myself. Shooting full mags, using 2 handguns. After 30 minutes an unmarked suv pulled in lot and watched me for 10-15 minutes. PGC officer got out of vehicle walked up to me asked for range permit. Showed him and he asked if i knew of 6rd max out of each mag, i told him nope and no one else here whats the big deal. Told me it's the law and because he was just transferred to this area i was getting a verbal warning, he didn't want to start working in this area known as a hard ass.Told him thanks and on his way he went.