My two exact powder choices with my 6.5x47 and 223 with br4s. 140 Berger hybrids in the 6.5 and 69 grain smk in the 223. I would like to spin up a faster twist 223 and try some 80.5 grain Bergers though. Maybe someday lol.I had had great success with CCI BR4’s in both my 6.5x47’s using H4350 and 223’s using Varget. SD’s rarely run higher then 5 in my rifles.