Looking to get a scope for my 223 to shoot out to 500yds. I've never really shot at these ranges.
Last year I set out to do what you are writing about... lots of practice with a 223. The SWFA 10x MQ was great, and did well far beyond 500 yards. If hunting were mixed in, I'd go 6x or 3-9x. I think Steelie, Flave, and Formi already mentioned it though.
If the shooter was capable, then all went well. If not, it was readily apparent... and it wasn't the rifle, scope, or the load at fault
.
The steel target in the pictures was 12" across, for reference. Some decent groups, but also some dropped shots. I could still spot hits and misses at 500y with 10x on the RAR.