This could be a serious animal to bring down without a brain shot now that i think about it. I was gonna say you guys are overthinking this. its only 75ft long at the biggest and most of that is tail and neck. MUCH thicker than elephant i guess but who knows, it may have soft skin and somewhat thick rib bones. Nothing a good solid from a elephant gun like a .460 weatherby, 458 lott, 600 nitro, 577 trex, etc couldnt handle. or could it??
they say those things have massssive lungs since they needed to breathe enough to o2 enrich the massive amount of blood in that animal. wiki says 500-liter, four-chambered heart and 900 liter capacity lungs
would a small 50 cal hole do anything to something that large?? i doubt it... would it crush that huge shoulder bone? maybe ona few shots. the spine looks promising tho but rumored to be very thick. only the biggest loads should be used i'd say. best bet a head shot. head shot is necessry to take out some sort of brain or vessels that supply oxygen to that beast's brain/brains