I know this isn't commonly thought of as a go to powder for the 223 but I tried this in a Ruger MKII sporter and was surprised at how well it shot. 26 grains with a 50 gr. V-Max isn't real fast, a little over 3100 fps out of a 22" barrel but accuracy was as good or better than some of the faster 223 powders with this rifle.
I've been using 26.0 grains of H-4895 and several different 50 grain bullets to get the best accuracy I've ever gotten with several 223's and two 222 Rem Mag rifles. Winchester WSR primers are an important ingredient for good accuracy, as Fed 205's don't get the job done.
I initially tried IMR-4895, and it wasn't as accurate as the "H" counterpart.
I get some fine accuracy with H-335 and 748 also, but H-4895 rules.
