Isn't there about 100fps difference between the .243 and the 6mm Creed?

.243 was rolled out in 1955 as combination deer/varmint rifle for their Model 70, 88 and 100 rifles.

No significant performance difference between the 2 cartridges. The biggest limitation for either is bullet weight maxed out right over 100 grains. Y'all say 100 grain is all you need. I say BS. I hope you lose the deer of your lifetime shooting that pea shooter it would teach you a lesson that just might stick:

There is no replacement for displacement.

Period.