Well folks I finally took my ole 870 to the gunsmith. When I get er back she'll have the ff3 mounted on a 336 base and the safety will be reversed to lefthand for me. I put the shurshot stock on a Few weeks ago, so hopefully I'll be ready to go. I got two sumtoy chokes from William. A .650 and a .660. I gotta send one back. I've patterned the .660 extensively and it does good, I haven't had time to give the .650 a fighting chance but from what I saw In the one evening I shot the 650 it was slightly behind the 660 as far as numbers in the 10 but overall more even in the 10, but If you look at a 15" pattern the .660 was much more even doin think I'm gonna keep the .660. I have no doubts about that choke.