I've got an 8.5 twisted Rock on my 7. Shoots about anything 160 or over very well. I'd try to avoid shooting a ram where a large exit wound could be difficult to repair. The nice thing about the 8.5 7 with heavies is it does reduce the need for exact wind reads.

I like 168 hybrids. Shot a whitetail buck in his bed at 35 yards. Bullet went in right under his chin through the throat patch. Bullet exited out back of his very thick neck with about a silver dollar sized hole. Close or far, I am shooting bergers till out of them, then trying 180 scenars.