I read on the internet that the last T-Rex they used for Jurassic Park died about a month ago.
The Whelen is one of the less common calibers I've come across in various ammo buys across the pawn counter. Eventually someone comes in and asks for one of the less mainstream cartridges and they do sell eventually. Gotta realize, south Florida has no deer bigger than a German Shep. Not much hunting down here but for boar in the 'Glades and a .44 mag revolver or 10 mm pistol works just fine on them and is a lot easier to hump around the sawgrass.