Here's a few I shot yesterday. The first 2 shots of the day.
I shot a 3" load of Hevi-13 3" 2oz #7's through the Pure Gold .670 and it was nowhere near what the 3.5" loads were. Now you know why I don't shoot 3" shells with the smaller payload out of my 835.
And here was the only shot I shot through this MAD Max .680 choke. This was 3.5 Hevi-13 #6 loads 2 and 1/4oz.