Minor correction. Sows can litter every 5 months, which means 12 litters every 5 years. I used to keep a small swineherd.Wild hogs in Florida are live trapped by the hundreds within state parks, city parks, and private lands. They're sold to "high fence" hunting ranches and shot by hunters for a reasonable cost. This is a system that works to help reduce the wild hog population while providing pork to hunters. Those that would criticize this system likely have no idea of the problems related to wild hog populations in Florida. Wild hogs produce at least three litters per year and the litters contain up to a dozen piglets at a time.
But yeah, infant mortality is low, and assuming a very conservative estimate of piglets surviving to reproduce, one sow and her progeny will spawn 125-130 new pigs every five years. More likely in places like Florida and Texas is 250 new piggies every 5 years, or even more. If you assume 8 out of 12 piglets survive to reproduce, the 5 year growth is over 500 from that single original sow. There are online calculators that can verify, and it has been a while since I did it, but that seems to be about correct. So yeah, anybody that gripes about how we hunt feral hogs doesn't grasp the gravity of the problem, or they're emotion-driven and simply don't care, being set on their floating abstractions WRT ethics.
In contrast, a white tail doe and her progeny will spawn *maybe* 25 new deer in 5 years.