If those are the old Knight brown sabots they probably are tight. There is a sabot that is easier to load than the tan or brown. Its made by Harvester and its light blue. They offer them in smooth and Crushrib but both are the same loaded OD.
Just swap sabots and use the same bullets.
Run a lightly damp patch and a dry patch between shots too. It will really help with T7. The fouling from T7 can get really hard near where the bullet seats against the powder.
Try the cheaper 10/200gr XTP too if you only want to shoot a 2 pellet load. FPS from 2 pellets is pretty mild and the XTPs just might work well for you at that FPS.
