Most Georgia Redneck punks like the ones pictured on our family Christmas Card will use just about anything to kill a hawg. But given a choice, I think all of us would agree the Vector V-51 Pistol in 308, around my nephews neck at the bottom, make for a challenging steady hand shot at long range.
I'm not sure what the record is for free range fair chase hog killing is, but excluding .... Thermal/NV Optics, Helicopters, Chase Vehicles and High Capacity Trapping Methods. We have never gone wrong with the 308.
308,223,22mag, 30-30, 17hmr ,12 ga,243, with good bullets u pick. also dogs and the bow are fun. You can kill one with a stick if u hit it right. Right now it's my ar. But it changes all the time.