I have just recently got into turkey hunting the last couple of years.I have just purchased an 870 21" barrel. I ordered a .660 jelly head choke. I know very little about shotguns. I am a squirrel hunter, and would love to learn from some of you more seasoned hunters.... I have shot several times.. Patterns. in which I'm not to happy with. My POA is not the same as my POI, in which I have learned from some of the post on here.. I guess the only way to change is to get differt sights? So I guess I'm asking what , and,which is the best sight, choke and shell combo is? Thank you!