Just for the record, my standard answer about power levels of hunting rifles used to be, "use the most powerful cartridge that you can shoot well". I can shoot up to 300 magnums reasonably well myself and have used the 30-06 more than any other cartridge. That said, the amount of good reviews on the 223 with the right bullets is making me take notice. I'm an old dog.......but I can learn new tricks and am not stuck in my ways. (not too stuck anyway).