I have 2 Rem700Tactical .223s in service. Neither has given me a moment's concern. I put over 14,000 50Z-Max's through one and it was still knocking off prairie dogs at 300yards
when I changed the barrel to a 26" #5 contour Shilen. That worked so well I sold the barrel off the 2nd to a buddy (who also has shot a Tactical .223 for about 7 years) as a backup
and replaced it with an identical Shilen. I've changed stocks and triggers, installed muzzle brakes and AR mag conversions, etc. One got most of the finish beat off it by hail.
They just keep running. No extraction problems, no feed problems, no powder in my face when I had case ruptures (twice).