Damn, just when you begin to think you've figured it out! I guess if you shoot enough the law of averages kicks in somewhere, weird stuff begins to happen occasionally.
I remember reading an article by Phill Shoemaker, if memory serves, about how he had amassed an entire array of recovered bullets over the years from his clients in many different calibers- including the large bore bear busters. Many of these bullets had "failed", from tumbling, pan caking, not expanding, fragmenting etc. but recovered from dead bear. If anyone can comment on the subject, it's people like him, in the industry, who see more than many of us ever will.
Brad, how far was the shot on that cow elk and what was the reaction, trailing job?