Need a bit of help. I am starting back iNto hunting after a 20+ year break. I picked up the 535 waterfowl and it came with 3 chokes. Full, modified adn improved cyln. Now from what the book tells me I can shoot steel shot through the full choke, however mymlocal gun smith says you should never shoot steel through anoything smaller the. Modified. I would like to know if I can use tlhe full choke for steel shot. I will be hunting duck and geese. Mostly mallard and canadians. There will be some shooting over decoys. But there is alyways those ones that like to fly by so it would be a bit of both. What would you guys that have experiance with these chokes recommend and again can I use the full choke with steel?