This has been popping in and out of my head for a while and sitting two days through a Canadian blizzard brought it back out. Do large caliber (ie 375 and up) solid bullets tumble after they hit an animal? Has anyone ever done research into this? For instance a 224 fmj bullet tumbles a lot, whereas a 308 fmj tumbles also (but much less so), so does something even bigger not tumble at all or does it penetrate for a ways before it does so? I've heard people go on about sectional density and penetration, but that advantage is diminished if the bullet is tumbling (unless you get a lot of penetration before it does so). I would guess that if they do they don't swap ends more than once or twice - if at all - but I'm not sure. Anyone have any insights?