There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
Even though body length would be better, total length still works well enough in weight predictions, bar the odd body types. Using the 311 cm-314 cm, I get a mass range of about 270-280 kg. For fun, say this tiger's tail is shorter, 0.45 of the body length, it's body length would be 215 cm-217 cm. Scaling the total length to be of the more common 1.5xbody length = total length, he'd be 323 cm-326 cm. By my formula, he could be anywhere from 305 kg-320 kg under these assumptions. Simple conjecture regardless, records leave so much to be desired in the morphological sciences department.