Ken,
Been using Bears since 1968, never had reason to try anything else. Although I have supplemented with Bodkins at times.
Have had many spine shots on deer and hogs and have always had complete pass thru with instant drop. In 1982 I shot a 220lb hog in the St. Johns river marsh, The hog was rooting and heading straight towards me.I head shot it with a 70lb recurve at 15yds. The BH passed thru the skull and buried about 4 inches into the neck. Dropped in it's tracks. The BH wasn't even bent!
The Bears are tough and have no problem splitting bone when hit, I've found they fly as tru as field points from all my bows 50-90#'s.
Use them with confidence, there is a reason this BH has been around for so long. It's because they work, and they work well.