I am curious to know why a backstrap shot with a CL could be any less tore up than a backstrap shot with a Partition? What makes a bullet that drops a deer like the Hammer of Thor any less effective than an expanding bullet more likely to penetrate all the way through, making a bore-diameter hole on exit? I don't get it. Elk, dangerous bears, other animals thicker than a deer, sure, but why on a deer? We want the bullet to get past hide and initial rib bones, then expend its energy inside on organs, not so?

From your description, the CL did not disintegrate on the hide, destroyed internal tissue - backstraps -, and even took out the spine, killing the deer instantly.