Dad just gave me a beautiful Winchester 59 Win Lite that is in great shape. It has an adjustable choke. I am wondering what type ammo to use. I also read somewhere that slugs are not good to use with this type barrel but I see that the choke has a 'slug' setting. The choke also has 'lMP CYL,' 'MOD,' lMP MOD,' 'Full' and 'X-Full' settings.The barrel is marked '12 gauge 2 3/4 chamb. Full.' Thanks for your help - I have seen some pictures of cracked receivers and don't want that to happen.