RK, I've seen feral hogs in the swamps of Florida, at 5 yards. I've also seen them in the more open country of west Texas, at some 300 yards. The damned things are all across the southern part of the U.S., all the way out to California.
Most are descendants of domestic hogs that escaped and "went native". That's where the term "Razorbacks" came from, for the University of Arkansas football team. Lean and lanky acorn-eaters of Arkansas, east Texas and northern Louisiana.
Some number of wild Russian boar were imported into the U.S. back in the late 1800s and into the 1900s. This was mostly in the Carolinas and Tennessee, SFAIK, although some came into Texas and, I guess, Kentucky (?). At any rate, the mixed progeny has spread and the genes are still around.
In the Brush Country of south Texas (bounded approximately by I-37 on the east and US 90 on the north), hogs have been killed that weighed up to 460 pounds (boar) and 549 pounds (sow).
The best eating size are young shoats weighing 40 to 60 pounds.
And now everybody's an expert.
Art