That's exactly where I'm at with my cowboy SG loads. Works like a charm!
Ellie was having issues with a broken shoulder, so I came up with an ultra lite load for her and it has performed flawless as well. 11gr of Red Dot, CB0175 wad, & 3/4oz of #8. IIRC, They chronoed around 650. If she does her part, the targets fall and the fliers turn to dust!