Re: 223 Barrel life for a hunting rifle??
Most hunters would find a .223 hunting rifle is impossible to wear out. 3,000-5,000 would be a reasonable expectation.
This changes drastically if it's a light semi-auto with a large clip where you could overheat the barrel every time you used it or if it'e a heavy barreled bolt-action that was never allowed to overheat.
For most HUNTERS with a .223, the barrel should outlast the hunter, and probably his kids.