I know what you mean. I have a Ruger MKII in .243 using IMR4350 pushing a 100gr Hornady BTSP. I sometimes start looking at 25.06 or a .257WBY wanting more. THe reality of it is the .243 does evrything I need it to do. I only use it for antelope and it has preformed quite well over the years. The longest shot was 275 paces (pre-laser) and it dropped on the spot.