It might be viable if mounted on a stable platform.
I could see something like this being useful as a anti-light vehicle weapon.
Or maybe against robot terminators...
Here is the Wiki article
The cartridge propels its 3,600 gr (230 g) bullet at approximately 2,200 ft/s (670 m/s). This yields a muzzle energy of 38,685 ft·lbf (52,450
J)[1] and a momentum of 154.1 Newton-seconds. This kinetic energy would allow the .950 JDJ to pass through several body-armored humans. It is
comparable to the original tank rounds of World War I in terms of ballistic energy.
Specifications
Parent case 20 x 102 mm Vulcan
Bullet diameter 0.950 in (24.13 mm)
Case length 4 in (101.6 mm)
I admit I would just scrap the rifle and develop a
Vulcan type weapon around the cartridge.
But hey, if you guys are going dinosaur hunting, have at it.
