Help with choke for Browning Inv + 20ga.

[Ranman]

Need Ideas for a good choke to try in Browning 20ga with Invector plus system.  It is a micro, with 22 in barrel.  Bore is .630. Plannig to shoot Hevi #7, or T 9's handloads.  Thanks,
Ranman

[SumToy]

Around 560 to 565 will work in it. 

[blackpowder hunter]

carlson turkey choke  ($18) .585, federal heavyweight #7. 40 yards, 144 in 10" circle. thats out of a upland special with 22" barrel. the whole pattern is about 17" square.

[Ranman]

That is not bad, I was looking at the Carlson's choke. 
Ranman

[turkey_slayer]

I used a kicks .560 and some TSS 9's and got 321 in the 10 at 40 yards with a unpolished barrel.  To tight to hunt with really.