Smith and Wesson make their 500Magnum and 460Magnum in that color scheme - black with a stainless cylinder.
I own several and I'll say it would be very difficult for an 11yo kid to fire the S&W 500 with factory loads.
A hog this big will come near killing you, if it catches up to you, a small one will run you down, been there and had them do that. Emptying 6 rounds of 44 mag at point blank would slow them but not a sure stop ... depending where you hit. But how accurate can you be when running at top speed? My only experience has been with hogs of about 350 pounds.
Hogs are really tough beasts.
That’s one big hog, if it’s a real photo. Sure wouldn’t go after it with any revolver, but that’s just me. 12 ga 30 inch full choke with 00 magnum would be my minimum.