My deer rifle a .222 is not up to the job for pigs what is a good calibre for a pig rifle.
Itis up to knocking pigs dead in their tracks providingthe right bullet is used and providingyou pick your shots carefully. I often hunt a huge piece of property that is restricted to rimfire rifles.i use a22 magnum when hunting there anditdoes a good job on hogs. Have killed a fewhogs with the .22 Hornet and quite a few with the .223.There is a man on this site who routinely kills big hogs with his .22 Hornet.
Most ofmy hogs are killed with a .50 muzzleloader.