I was having a browse on the web for reports on the Barnes TSX and came across this thread on Reloadersnest.com. There are some interesting posts there but just look at some of the distances they are quoting, e.g. an elk at 745 yards.
Now, I'm quite happy creeping around in the undergrowth and tend to take most of my deer, invariably roe or muntjac, between 50 and 100 yards. I know things stretch out a little further on the hill but surely nobody pushes their luck as far as some at reloadersnest appear to do.