duck, I honestly like to go heavy for caliber in almost all my rifles. I try to go with the heaviest that my twist will accommodate. Except in most of my 30-06's. I generally stick around 180gr with those except in one of my builds off a K98 action. It absolutely LOVES 220gr RN Interlock and it's usually my go to Moose gun anyway. Speed is all well and good but momentum and stored energy is where you get the "umph" from in a bullet. Light for caliber bullets have a tendency to destroy themselves and a lot of meat in the process. Especially in the .243. Just seen too many deer hit with the little fast bullets from that caliber all tore up and a whole quarter deer absolutely shot all to hell.