I can’t help you with a clone of the “Black” line but it’s the worst thing I have fired out of mine. The tan box stuff was pretty good but the black I had was all over the place.
Enough so, a friend and I were taking turns, keeping an eye on the brass hitting the ground, as we shot. After a couple of strings he asked me, “how did that Last one shoot?” I told him, “not as good as the others.” Then he pointed out the fact that “this pile” are the ones you shot right before and “these, these, those over there and that one were from that last box.”