A couple weeks ago, I took pellets and shot in my Black Diamond XR. With 100 grains of pellets and a 250 grain Shockwave it shot beautiful groups at63 yards. I was not surprised the first shot was off as it normally is with this rifle.
then for kicks I tried three pellets at the same distance with the same bullet.
I adjusted for the last shot with 150 grains of powder. BUT still the group was much larger then with 100 grains. Now I know with loose powder 120 grain it shoots good groups. But for what it did with 100 grains, I would be happy to live with that and pellets.