That’s why people argue the 6.5x55 loaded to modern pressures is better. But at that point it’s not strictly a 6.5x55…..Interesting reading your case capacity on the Creedmore.
On my 6.5x55 swede, using LAPUA cases I measure the capacity at a midge under 60 grains.
I have 6.5x55 ackley dies sat in the loading room and will be getting an ackley barrel put on my swede when I kill the current one or I have a spare £800 knocking about.