Atleast out of Edgefield Country, SC where I will be hunting.

Go to a gunsmith with your gun before you try to purchase any barrel. From what you describe you have an older model 870. I am not so sure the newer model 870 barrels are that adaptable as Remington cheapened up theur guns with some stamped metal parts.

And others are correct - it might be able to have screw in chokes added to that - I am going to a gunsmith internet bud I know and will ask him if it can be done - how much it will cost you.
JW

With an improved cylinder choke that turkey would need to be really close, like bow close!

Chart 1 Percentage Of Shot Inside 30" Circle CHOKE 20 Yds 30 Yds 40 yds Cylinder 80% 60% 40% Skeet 92% 72% 50% Improved Cylinder 100% 77% 55% Modified 100% 83% 60% Improved Modified 100% 91% 65% Full 100% 100% 70%
Based on this chart a 30 yard shot the improved cylinder will provide 77% and a full choke at 40 only produces 70%. Therefore, it should be good at 30 yards and under, but you need to pattern it to see what your gun actually does. I would suggest #6 shot for a more dense pattern and they have plenty of energy to make a clean kill at 30 yards.

Buy some turkey head targets (Cheap) which have instructions on patterning your gun safely and efficiently....

Christ the last time I recomended someone using a turkey target to pattern there gun. All the 10" circle A Holes came out

That's right. Most of the public land hunters pattern their guns as they're walking to their spoton a can that's been left in the woods. If they hit it, that's good enough!

It appears some use stop signs....