I purchased a Stevens 320 - 20 gauge new in box. The Owner's manual says these are shipped with modified choke tube. The seller told me this was full choke. I took out the tube and there are no letters telling me like my 12 gauge model, only three white III marks on the outer edge of choke at muzzle. What choke do I have here? What other chokes should I get once I know this one?
Thanks,
ENBLOC