You can use it. I used my 870 28" barrel for turkey for quite a while. I did eventually get a mossy 835 with a shorter barrel, I don't particularly like carrying the longer barreled gun thru the woods. I just prefer a shorter barrel. When you get a choke, you should get one rated for heavy shot, the patterns are generally much tighter than lead loads. I'm sure if you search this forum you will get lots of good info on choke/load combinations to try. Higher end chokes like the Rhino, Pure Gold, and Indian Creek throw awesome patterns but cost a few $$. A quality less expensive choke like the Primos Jelly Head throw some great patterns too. Welcome to the addiction!