I may have been lucky, but I bought a used Ruger #1 .223 and personally shot over 5000 rounds through it and then had it made into a .223 AI and shot another 5000+ rounds through it before accuracy slipped. It then had a Lilja 7 twist barrel chambered in .223 AI put on it and is still going strong.
My shooting partners cannot believe how fast I can fire that rifle off a bench in the dog towns. I use a 6.5x20 Leupold scope on that rifle.
