After a lot of testing, I've found that Invector plus guns with 24" barrels like a 660 choke. I have a Browning Silver. My 24" barrel likes the non ported PG 660. This tube was designed for the Fed #7 HW load. I tried to get the Fed load to pattern, but it wouldn't out of my gun.
I'm going to get some 3.5 #5 Win Long Beards to try in the PG 660. The turkey thugs 3.5" #5 liked the PG 660.
I also have some Win 3" #6 XR and old Federal blue/gold boxes to try as well.
I have tried the following chokes; PG 675, JH 670, Ballistic Specialties 655, and the PG 660 NP.