there is a big argument about this going on over at http://www.accuratereloading.com's african forum. some say yes, some say not usually, some say yes,but only if it hits a big bone, and some blame poor bullet quality, if tumbling occurs. then they get into round versus flat solids, and most agree the round solids may tumble more. i personally have not seen tumbling as much as deflection from hitting bone. i shot a caribou from about 80 yards just into the front of the left shoulder and the bullet exited the left chest at about a 60 degree deflection. this was a .300 magnum, 180 grain remington corelokt bullet. the bull was slightly quartering toward me. i have not shot so many big anuimals that i would pretend to be an expert.

If a large calibre tumbled it would have a tuff time traveling a straight line to an elephants brain. It would also have a tuff time travening a straight line thru any heavy framed animal. I think the notion of tumbling comes from the military type solids that are saitdto tumble. In that case tho the shape of to bullet might cause it. soloids for dangerious game I think are always nound nose. the other way to make a bullet tumble would to be to have the wrong twist rate. Then tho, the bullet may well start before hitting anything, I doubt thats a problem. If the bullet were a lead core, and most are, even a solid would be prone to coming apart on entry, the core would just be forced out the back. I have seen photo's of heavy solids that had killed animals that looked like they could be re-used. Bullet can't tumble and come out like that.