Singleshot-
I have tried what you said. My gun is shooting where I aim but I am not getting real tight patterns like others are posting.

Mauser 06-
My words were typed wrong. I meant that I was afraid to shoot 3" because I didn't want to possibly lose extra shot and yardage.

I think I need to try another choke but this is my second choke. The first was a pattern master and now the ventilator (.655). Both of these chokes are at opposite ends of the spectrum. PM is really open and the ventilator is constricted. What now?

Thanks everyone for your help and advice.
P.S. does anyone have a choke they want to sell that didn't pattern good in their 870?