Cal, you can use Bismuth shot, Cabelas is handling it. The Kent Cartridge Co. bought the rights to the name "Bismuth" from Estate cartridge Co who was manufacturing it. They have it in #6 and 5 shot. PA, April 30 to May 14, half hour before sunrise to noon, May 16 to may 31, half hour before sunrise to half hour after sunset. Hunting by calling only, no stalking allowed. Shotgun only fine shot no larger than #4 lead, no larger than #2 steel shot and no larger than #4 of any other approved nox tox shot. Bearded birds only 1 per season, 2 if you purchase a 2nd spring bird tag.