I think in 603country's situation it is best to pass on the 223.
300-450 yards is a luxury many pig killers don't have. Under 100yds, I can profess that the .223 excels at killing pigs. There could be a pig 300yds away, and I wouldn't see it, I can hear them sometimes.
Navin R. Johnson: "He hates these cans!!!! Stay away from the cans!!!!"