My .223 Handi bull barrel likes 50gr Nosler BT ... Win brass ... 400 CCI primers ... 26gr of Varget powder (this is MAX load) ... 2.261" OAL. Do not start out at 26.0gr of Varget but as usual, work your way up to it. I have shot 5 consecutive 3 shot groups with all groups measuring between .600" and .750." However, I did shoot a .248" 3 shot group one other time with this load. I have tried 55gr Nosler and Vmax's but not with as much consistency in groups.
Good luck ... be safe ...