Believe me this will save you a bunch of time and money.
Call Gobblerguns Tech and Inquiry at 1-870-251-9955
Tell them what gun you have. Make, model and barrel length. They will have the best suggestions for what loads and which of their chokes will work best for your gun. They don't just make chokes they custom modify guns and confirm the patterns. They have a very good database on what works best with most guns.
If you just want a choke that's fine. They'll give you their best suggestions. If the choke doesn't perform well enough they will exchange it for free for a different choke until you are satisfied with their choke. I've got two of their chokes for two different guns and was immediately satisfied with their performance. I've cleanly killed five gobblers with their choke.
Gobblerguns will save you the expense of testing different loads and chokes.
Here's a video of me using their choke. I was shooting a Browning Gold with 3 1/2" Win Extended Range #5s
http://static.ak.fbcdn.net/rsrc.php/z4OG5/hash/7qkbs3nb.swf?v=1385507444660&ev=0