I dont agree with you the rounds are so similar i dont see people with 243s already running out to buy a rifle chamber in 6.8 heres some ballsistc compairisons off the remington site so everyone can see. I know i wouldnt trade my 243 for the 6.8 SPC
The 243 the higher ballistic Coefficient, well using these 100 gr loads from remington they only ones offered on hte compairison