Would not be my first, second or even third choice, but likely better than a rock?? Even a "sharp stick" (arrow) works well when properly applied. B-Tips seem to be designed as "deer bullets" - expand rapidly after very little penetration. Some efforts, apparently, to thicken up the jacket on some, but I do not know if the 30 caliber 180 grain were one of them... If you can guarantee to slip one between ribs, on a quartering away shot, will likely drop it like a stone. Hit shoulder bone and pretty much have a mess to deal with, if you ever catch up to it...
I do believe that the older ones that came in red and black boxes were much tougher - once Accubonds came out, do not know about later made ones. Sort of like Hoppe's #9 - used to be very useful - established a reputation, then cheapened up and changed - people still buy and use it thinking it works like the "old" stuff, but it does not.