I HAVE A BROWNING 12GA. WITH A POLY CHOKE. CAN YOU TELL ME IS THE SLUG SETTING THE MOST OPEN CHOKE OR MOST CLOSED? I KNOW X-FULL IS MORE CLOSED. WHAT KIND OF SLUGS ARE BEST FOR A SMOOTH BORE WITH THIS CHOKE? I HEARD SABOT SLUGS DO NOT FIRE WELL IN SMOOTH BORE BARRELS.